21913035951996 has 192 divisors, whose sum is σ = 69209878528000. Its totient is φ = 5856267418560.

The previous prime is 21913035951979. The next prime is 21913035951997. The reversal of 21913035951996 is 69915953031912.

21913035951996 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 30 + 3 + 595 + 1 + 9 + 9 + 6 = 666.

It is a super-2 number, since 2×21913035951996² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21913035951997) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8520640 + ... + 10790151.

Almost surely, 2^{21913035951996} is an apocalyptic number.

It is an amenable number.

21913035951996 is an abundant number, since it is smaller than the sum of its proper divisors (47296842576004).

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

21913035951996 is a wasteful number, since it uses less digits than its factorization.

21913035951996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19310909 (or 19310901 counting only the distinct ones).

The product of its (nonzero) digits is 17714700, while the sum is 63.

The spelling of 21913035951996 in words is "twenty-one trillion, nine hundred thirteen billion, thirty-five million, nine hundred fifty-one thousand, nine hundred ninety-six".