20427445375 has 16 divisors (see below), whose sum is σ = 26115249888. Its totient is φ = 15943368000.

The previous prime is 20427445349. The next prime is 20427445397. The reversal of 20427445375 is 57354472402.

It is a de Polignac number, because none of the positive numbers 2^k-20427445375 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1987797 + ... + 1998046.

It is an arithmetic number, because the mean of its divisors is an integer number (1632203118).

Almost surely, 2^20427445375 is an apocalyptic number.

20427445375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20427445375 is a deficient number, since it is larger than the sum of its proper divisors (5687804513).

20427445375 is an equidigital number, since it uses as much as digits as its factorization.

20427445375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985899 (or 3985889 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 43.

The spelling of 20427445375 in words is "twenty billion, four hundred twenty-seven million, four hundred forty-five thousand, three hundred seventy-five".