20188810451936 has 96 divisors (see below), whose sum is σ = 49396787762112. Its totient is φ = 7923294167040.

The previous prime is 20188810451921. The next prime is 20188810451969. The reversal of 20188810451936 is 63915401888102.

It is a super-2 number, since 2×20188810451936² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

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 15 ways as a sum of consecutive naturals, for example, 71503475 + ... + 71785266.

It is an arithmetic number, because the mean of its divisors is an integer number (514549872522).

Almost surely, 2^{20188810451936} is an apocalyptic number.

It is an amenable number.

20188810451936 is an abundant number, since it is smaller than the sum of its proper divisors (29207977310176).

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

20188810451936 is a wasteful number, since it uses less digits than its factorization.

20188810451936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143288812 (or 143288804 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 20188810451936 in words is "twenty trillion, one hundred eighty-eight billion, eight hundred ten million, four hundred fifty-one thousand, nine hundred thirty-six".