21373514375 has 30 divisors (see below), whose sum is σ = 27308620944. Its totient is φ = 16715388000.

The previous prime is 21373514369. The next prime is 21373514443. The reversal of 21373514375 is 57341537312.

It is not a de Polignac number, because 21373514375 - 2⁶ = 21373514311 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 29 ways as a sum of consecutive naturals, for example, 25056449 + ... + 25057301.

Almost surely, 2^21373514375 is an apocalyptic number.

21373514375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21373514375 is a deficient number, since it is larger than the sum of its proper divisors (5935106569).

21373514375 is an frugal number, since it uses more digits than its factorization.

21373514375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 905 counting only the distinct ones).

The product of its digits is 264600, while the sum is 41.

The spelling of 21373514375 in words is "twenty-one billion, three hundred seventy-three million, five hundred fourteen thousand, three hundred seventy-five".