185425121420 has 144 divisors (see below), whose sum is σ = 493730899200. Its totient is φ = 57254144640.

The previous prime is 185425121419. The next prime is 185425121443. The reversal of 185425121420 is 24121524581.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1761431 + ... + 1863729.

It is an arithmetic number, because the mean of its divisors is an integer number (3428686800).

Almost surely, 2^185425121420 is an apocalyptic number.

185425121420 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 185425121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246865449600).

185425121420 is an abundant number, since it is smaller than the sum of its proper divisors (308305777780).

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

185425121420 is a wasteful number, since it uses less digits than its factorization.

185425121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102444 (or 102431 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The spelling of 185425121420 in words is "one hundred eighty-five billion, four hundred twenty-five million, one hundred twenty-one thousand, four hundred twenty".