20677460638 has 32 divisors (see below), whose sum is σ = 34583155200. Its totient is φ = 9214694784.

The previous prime is 20677460623. The next prime is 20677460653. The reversal of 20677460638 is 83606477602.

It is an interprime number because it is at equal distance from previous prime (20677460623) and next prime (20677460653).

It is a junction number, because it is equal to n+sod(n) for n = 20677460591 and 20677460600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131483 + ... + 2141161.

It is an arithmetic number, because the mean of its divisors is an integer number (1080723600).

Almost surely, 2^20677460638 is an apocalyptic number.

20677460638 is a deficient number, since it is larger than the sum of its proper divisors (13905694562).

20677460638 is a wasteful number, since it uses less digits than its factorization.

20677460638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13024.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 20677460638 in words is "twenty billion, six hundred seventy-seven million, four hundred sixty thousand, six hundred thirty-eight".