21520002223296 has 42 divisors (see below), whose sum is σ = 61683200818772. Its totient is φ = 7173334074240.

The previous prime is 21520002223217. The next prime is 21520002223303. The reversal of 21520002223296 is 69232220002512.

It is a happy number.

21520002223296 is a `hidden beast` number, since 2 + 1 + 520 + 0 + 0 + 22 + 23 + 2 + 96 = 666.

It is a super-2 number, since 2×21520002223296² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21520002223296.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18680556910 + ... + 18680558061.

Almost surely, 2^{21520002223296} is an apocalyptic number.

It is an amenable number.

21520002223296 is an abundant number, since it is smaller than the sum of its proper divisors (40163198595476).

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

21520002223296 is a wasteful number, since it uses less digits than its factorization.

21520002223296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37361114989 (or 37361114976 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 21520002223296 in words is "twenty-one trillion, five hundred twenty billion, two million, two hundred twenty-three thousand, two hundred ninety-six".