20677169878 has 16 divisors (see below), whose sum is σ = 32894832096. Its totient is φ = 9726963840.

The previous prime is 20677169869. The next prime is 20677169941. The reversal of 20677169878 is 87896177602.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3681651 + ... + 3687262.

It is an arithmetic number, because the mean of its divisors is an integer number (2055927006).

Almost surely, 2^20677169878 is an apocalyptic number.

20677169878 is a deficient number, since it is larger than the sum of its proper divisors (12217662218).

20677169878 is a wasteful number, since it uses less digits than its factorization.

20677169878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368999.

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 20677169878 in words is "twenty billion, six hundred seventy-seven million, one hundred sixty-nine thousand, eight hundred seventy-eight".