20525644371 has 4 divisors (see below), whose sum is σ = 27367525832. Its totient is φ = 13683762912.

The previous prime is 20525644361. The next prime is 20525644397. The reversal of 20525644371 is 17344652502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20525644371 - 2¹⁷ = 20525513299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525644361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3420940726 + ... + 3420940731.

It is an arithmetic number, because the mean of its divisors is an integer number (6841881458).

Almost surely, 2^20525644371 is an apocalyptic number.

20525644371 is a deficient number, since it is larger than the sum of its proper divisors (6841881461).

20525644371 is an equidigital number, since it uses as much as digits as its factorization.

20525644371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841881460.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 20525644371 in words is "twenty billion, five hundred twenty-five million, six hundred forty-four thousand, three hundred seventy-one".