20969704971 has 12 divisors (see below), whose sum is σ = 31108211472. Its totient is φ = 13601970576.

The previous prime is 20969704967. The next prime is 20969705021. The reversal of 20969704971 is 17940796902.

20969704971 is a `hidden beast` number, since 20 + 9 + 69 + 70 + 497 + 1 = 666.

It is not a de Polignac number, because 20969704971 - 2² = 20969704967 is a prime.

It is a super-2 number, since 2×20969704971² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20969704271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31485711 + ... + 31486376.

It is an arithmetic number, because the mean of its divisors is an integer number (2592350956).

Almost surely, 2^20969704971 is an apocalyptic number.

20969704971 is a deficient number, since it is larger than the sum of its proper divisors (10138506501).

20969704971 is a wasteful number, since it uses less digits than its factorization.

20969704971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62972130 (or 62972127 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 20969704971 in words is "twenty billion, nine hundred sixty-nine million, seven hundred four thousand, nine hundred seventy-one".