20901941878 has 16 divisors (see below), whose sum is σ = 31467827664. Its totient is φ = 10412730720.

The previous prime is 20901941843. The next prime is 20901941887. The reversal of 20901941878 is 87814910902.

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, 655501 + ... + 686647.

It is an arithmetic number, because the mean of its divisors is an integer number (1966739229).

Almost surely, 2^20901941878 is an apocalyptic number.

20901941878 is a deficient number, since it is larger than the sum of its proper divisors (10565885786).

20901941878 is a wasteful number, since it uses less digits than its factorization.

20901941878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32367.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 20901941878 in words is "twenty billion, nine hundred one million, nine hundred forty-one thousand, eight hundred seventy-eight".