21913435017936 has 160 divisors (see below), whose sum is σ = 78420373632000. Its totient is φ = 5691801294720.

The previous prime is 21913435017931. The next prime is 21913435017961. The reversal of 21913435017936 is 63971053431912.

21913435017936 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 3 + 43 + 501 + 7 + 93 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21913435017931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329353386 + ... + 329419913.

It is an arithmetic number, because the mean of its divisors is an integer number (490127335200).

Almost surely, 2^{21913435017936} is an apocalyptic number.

It is an amenable number.

21913435017936 is an abundant number, since it is smaller than the sum of its proper divisors (56506938614064).

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

21913435017936 is a wasteful number, since it uses less digits than its factorization.

21913435017936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658773334 (or 658773322 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 21913435017936 in words is "twenty-one trillion, nine hundred thirteen billion, four hundred thirty-five million, seventeen thousand, nine hundred thirty-six".