20451853683 has 12 divisors (see below), whose sum is σ = 29552587480. Its totient is φ = 13629482496.

The previous prime is 20451853673. The next prime is 20451853703. The reversal of 20451853683 is 38635815402.

20451853683 is a `hidden beast` number, since 2 + 0 + 4 + 518 + 53 + 6 + 83 = 666.

It is not a de Polignac number, because 20451853683 - 2⁵ = 20451853651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20451853613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398341 + ... + 446742.

Almost surely, 2^20451853683 is an apocalyptic number.

20451853683 is a deficient number, since it is larger than the sum of its proper divisors (9100733797).

20451853683 is a wasteful number, since it uses less digits than its factorization.

20451853683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847778 (or 847775 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 20451853683 in words is "twenty billion, four hundred fifty-one million, eight hundred fifty-three thousand, six hundred eighty-three".