20637144475 has 12 divisors (see below), whose sum is σ = 27095357304. Its totient is φ = 15538555520.

The previous prime is 20637144469. The next prime is 20637144487. The reversal of 20637144475 is 57444173602.

It is not a de Polignac number, because 20637144475 - 2⁷ = 20637144347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24278569 + ... + 24279418.

It is an arithmetic number, because the mean of its divisors is an integer number (2257946442).

Almost surely, 2^20637144475 is an apocalyptic number.

20637144475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20637144475 is a deficient number, since it is larger than the sum of its proper divisors (6458212829).

20637144475 is a wasteful number, since it uses less digits than its factorization.

20637144475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48558014 (or 48558009 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 20637144475 in words is "twenty billion, six hundred thirty-seven million, one hundred forty-four thousand, four hundred seventy-five".