20565500676 has 24 divisors (see below), whose sum is σ = 54841335360. Its totient is φ = 5875857312.

The previous prime is 20565500629. The next prime is 20565500689. The reversal of 20565500676 is 67600556502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122413611 + ... + 122413778.

It is an arithmetic number, because the mean of its divisors is an integer number (2285055640).

Almost surely, 2^20565500676 is an apocalyptic number.

It is an amenable number.

20565500676 is an abundant number, since it is smaller than the sum of its proper divisors (34275834684).

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

20565500676 is a wasteful number, since it uses less digits than its factorization.

20565500676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244827403 (or 244827401 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 20565500676 in words is "twenty billion, five hundred sixty-five million, five hundred thousand, six hundred seventy-six".