20857676554 has 32 divisors (see below), whose sum is σ = 38023655040. Its totient is φ = 8449694400.

The previous prime is 20857676537. The next prime is 20857676561. The reversal of 20857676554 is 45567675802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20857676495 and 20857676504.

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, 1249102 + ... + 1265689.

It is an arithmetic number, because the mean of its divisors is an integer number (1188239220).

Almost surely, 2^20857676554 is an apocalyptic number.

20857676554 is a deficient number, since it is larger than the sum of its proper divisors (17165978486).

20857676554 is a wasteful number, since it uses less digits than its factorization.

20857676554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514846.

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 20857676554 in words is "twenty billion, eight hundred fifty-seven million, six hundred seventy-six thousand, five hundred fifty-four".