20457286651 has 24 divisors (see below), whose sum is σ = 22315181616. Its totient is φ = 18739015680.

The previous prime is 20457286649. The next prime is 20457286667. The reversal of 20457286651 is 15668275402.

It is not a de Polignac number, because 20457286651 - 2¹ = 20457286649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20457286621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5531635 + ... + 5535331.

It is an arithmetic number, because the mean of its divisors is an integer number (929799234).

Almost surely, 2^20457286651 is an apocalyptic number.

20457286651 is a deficient number, since it is larger than the sum of its proper divisors (1857894965).

20457286651 is a wasteful number, since it uses less digits than its factorization.

20457286651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 20457286651 in words is "twenty billion, four hundred fifty-seven million, two hundred eighty-six thousand, six hundred fifty-one".