20976305838 has 16 divisors (see below), whose sum is σ = 42928254336. Its totient is φ = 6829494840.

The previous prime is 20976305807. The next prime is 20976305849. The reversal of 20976305838 is 83850367902.

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, 40651498 + ... + 40652013.

It is an arithmetic number, because the mean of its divisors is an integer number (2683015896).

Almost surely, 2^20976305838 is an apocalyptic number.

20976305838 is an abundant number, since it is smaller than the sum of its proper divisors (21951948498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20976305838 is a wasteful number, since it uses less digits than its factorization.

20976305838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81303559.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 20976305838 in words is "twenty billion, nine hundred seventy-six million, three hundred five thousand, eight hundred thirty-eight".