20972907843402 has 32 divisors (see below), whose sum is σ = 43392850603200. Its totient is φ = 6749803767168.

The previous prime is 20972907843379. The next prime is 20972907843421. The reversal of 20972907843402 is 20434870927902.

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, 11716758 + ... + 13387614.

It is an arithmetic number, because the mean of its divisors is an integer number (1356026581350).

Almost surely, 2^{20972907843402} is an apocalyptic number.

20972907843402 is an abundant number, since it is smaller than the sum of its proper divisors (22419942759798).

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

20972907843402 is a wasteful number, since it uses less digits than its factorization.

20972907843402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743030.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 20972907843402 in words is "twenty trillion, nine hundred seventy-two billion, nine hundred seven million, eight hundred forty-three thousand, four hundred two".