20427409375 has 12 divisors (see below), whose sum is σ = 25532631432. Its totient is φ = 16341925000.

The previous prime is 20427409363. The next prime is 20427409427. The reversal of 20427409375 is 57390472402.

It is not a de Polignac number, because 20427409375 - 2²³ = 20419020767 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 11 ways as a sum of consecutive naturals, for example, 3265261 + ... + 3271510.

It is an arithmetic number, because the mean of its divisors is an integer number (2127719286).

Almost surely, 2^20427409375 is an apocalyptic number.

20427409375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20427409375 is a deficient number, since it is larger than the sum of its proper divisors (5105222057).

20427409375 is an frugal number, since it uses more digits than its factorization.

20427409375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536796 (or 6536776 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 20427409375 in words is "twenty billion, four hundred twenty-seven million, four hundred nine thousand, three hundred seventy-five".