20979982702 has 16 divisors (see below), whose sum is σ = 35999608032. Its totient is φ = 8982940320.

The previous prime is 20979982687. The next prime is 20979982721. The reversal of 20979982702 is 20728997902.

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, 691353 + ... + 721060.

It is an arithmetic number, because the mean of its divisors is an integer number (2249975502).

Almost surely, 2^20979982702 is an apocalyptic number.

20979982702 is a deficient number, since it is larger than the sum of its proper divisors (15019625330).

20979982702 is a wasteful number, since it uses less digits than its factorization.

20979982702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413483.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 20979982702 in words is "twenty billion, nine hundred seventy-nine million, nine hundred eighty-two thousand, seven hundred two".