21377136225075 has 48 divisors (see below), whose sum is σ = 37599921772416. Its totient is φ = 10679628556800.

The previous prime is 21377136225073. The next prime is 21377136225161. The reversal of 21377136225075 is 57052263177312.

It is not a de Polignac number, because 21377136225075 - 2¹ = 21377136225073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (21377136225073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39461737 + ... + 39999786.

It is an arithmetic number, because the mean of its divisors is an integer number (783331703592).

Almost surely, 2^{21377136225075} is an apocalyptic number.

21377136225075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21377136225075 is a deficient number, since it is larger than the sum of its proper divisors (16222785547341).

21377136225075 is a wasteful number, since it uses less digits than its factorization.

21377136225075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79461764 (or 79461759 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 51.

The spelling of 21377136225075 in words is "twenty-one trillion, three hundred seventy-seven billion, one hundred thirty-six million, two hundred twenty-five thousand, seventy-five".