190556387420 has 96 divisors (see below), whose sum is σ = 484366200192. Its totient is φ = 61474111488.

The previous prime is 190556387407. The next prime is 190556387443. The reversal of 190556387420 is 24783655091.

It is a happy number.

190556387420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190556387420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11599052 + ... + 11615468.

It is an arithmetic number, because the mean of its divisors is an integer number (5045481252).

It is a 1-persistent number, because it is pandigital, but 2⋅190556387420 = 381112774840 is not.

Almost surely, 2^190556387420 is an apocalyptic number.

190556387420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190556387420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242183100096).

190556387420 is an abundant number, since it is smaller than the sum of its proper divisors (293809812772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

190556387420 is a wasteful number, since it uses less digits than its factorization.

190556387420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21327 (or 21325 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 190556387420 in words is "one hundred ninety billion, five hundred fifty-six million, three hundred eighty-seven thousand, four hundred twenty".