20251142275646 has 32 divisors (see below), whose sum is σ = 31141710302976. Its totient is φ = 9870957880000.

The previous prime is 20251142275631. The next prime is 20251142275669. The reversal of 20251142275646 is 64657224115202.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20251142275646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598226621 + ... + 598260471.

It is an arithmetic number, because the mean of its divisors is an integer number (973178446968).

Almost surely, 2^{20251142275646} is an apocalyptic number.

20251142275646 is a deficient number, since it is larger than the sum of its proper divisors (10890568027330).

20251142275646 is a wasteful number, since it uses less digits than its factorization.

20251142275646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39328.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 20251142275646 in words is "twenty trillion, two hundred fifty-one billion, one hundred forty-two million, two hundred seventy-five thousand, six hundred forty-six".