20001971765974 has 16 divisors (see below), whose sum is σ = 32733550296720. Its totient is φ = 9090957836160.

The previous prime is 20001971765959. The next prime is 20001971765989. The reversal of 20001971765974 is 47956717910002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20001971765959) and next prime (20001971765989).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42134199 + ... + 42606274.

It is an arithmetic number, because the mean of its divisors is an integer number (2045846893545).

Almost surely, 2^{20001971765974} is an apocalyptic number.

20001971765974 is a deficient number, since it is larger than the sum of its proper divisors (12731578530746).

20001971765974 is a wasteful number, since it uses less digits than its factorization.

20001971765974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84751215.

The product of its (nonzero) digits is 6667920, while the sum is 58.

The spelling of 20001971765974 in words is "twenty trillion, one billion, nine hundred seventy-one million, seven hundred sixty-five thousand, nine hundred seventy-four".