20969845926 has 32 divisors (see below), whose sum is σ = 42641922528. Its totient is φ = 6872989440.

The previous prime is 20969845901. The next prime is 20969845927. The reversal of 20969845926 is 62954896902.

It is a self number, because there is not a number n which added to its sum of digits gives 20969845926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20969845927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284970 + ... + 1301186.

It is an arithmetic number, because the mean of its divisors is an integer number (1332560079).

Almost surely, 2^20969845926 is an apocalyptic number.

20969845926 is an abundant number, since it is smaller than the sum of its proper divisors (21672076602).

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

20969845926 is a wasteful number, since it uses less digits than its factorization.

20969845926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19816.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 20969845926 in words is "twenty billion, nine hundred sixty-nine million, eight hundred forty-five thousand, nine hundred twenty-six".