20616963878 has 32 divisors (see below), whose sum is σ = 37214899200. Its totient is φ = 8368242624.

The previous prime is 20616963869. The next prime is 20616963889. The reversal of 20616963878 is 87836961602.

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, 1035251 + ... + 1054977.

It is an arithmetic number, because the mean of its divisors is an integer number (1162965600).

Almost surely, 2^20616963878 is an apocalyptic number.

20616963878 is a deficient number, since it is larger than the sum of its proper divisors (16597935322).

20616963878 is a wasteful number, since it uses less digits than its factorization.

20616963878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23684.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 20616963878 in words is "twenty billion, six hundred sixteen million, nine hundred sixty-three thousand, eight hundred seventy-eight".