20622256456 has 8 divisors (see below), whose sum is σ = 38666730870. Its totient is φ = 10311128224.

The previous prime is 20622256441. The next prime is 20622256463. The reversal of 20622256456 is 65465222602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10431353956 + 10190902500 = 102134^2 + 100950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20622256456² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288891021 + ... + 1288891036.

Almost surely, 2^20622256456 is an apocalyptic number.

It is an amenable number.

20622256456 is a deficient number, since it is larger than the sum of its proper divisors (18044474414).

20622256456 is a wasteful number, since it uses less digits than its factorization.

20622256456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577782063 (or 2577782059 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20622256456 in words is "twenty billion, six hundred twenty-two million, two hundred fifty-six thousand, four hundred fifty-six".