20969905488 has 80 divisors (see below), whose sum is σ = 62835264000. Its totient is φ = 5901971328.

The previous prime is 20969905459. The next prime is 20969905531. The reversal of 20969905488 is 88450996902.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443238 + ... + 488261.

It is an arithmetic number, because the mean of its divisors is an integer number (785440800).

Almost surely, 2^20969905488 is an apocalyptic number.

20969905488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20969905488 is an abundant number, since it is smaller than the sum of its proper divisors (41865358512).

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

20969905488 is a wasteful number, since it uses less digits than its factorization.

20969905488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931584 (or 931578 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 20969905488 in words is "twenty billion, nine hundred sixty-nine million, nine hundred five thousand, four hundred eighty-eight".