20910799678 has 16 divisors (see below), whose sum is σ = 31569842304. Its totient is φ = 10387739160.

The previous prime is 20910799643. The next prime is 20910799759. The reversal of 20910799678 is 87699701902.

It is a happy number.

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, 136201 + ... + 245707.

It is an arithmetic number, because the mean of its divisors is an integer number (1973115144).

Almost surely, 2^20910799678 is an apocalyptic number.

20910799678 is a deficient number, since it is larger than the sum of its proper divisors (10659042626).

20910799678 is a wasteful number, since it uses less digits than its factorization.

20910799678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110127.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 20910799678 in words is "twenty billion, nine hundred ten million, seven hundred ninety-nine thousand, six hundred seventy-eight".