21752372993 has 8 divisors (see below), whose sum is σ = 23543352000. Its totient is φ = 19978211088.

The previous prime is 21752372963. The next prime is 21752373011. The reversal of 21752372993 is 39927325712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21752372993 - 2²⁸ = 21483937537 is a prime.

It is a super-3 number, since 3×21752372993³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21752372923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4201583 + ... + 4206756.

It is an arithmetic number, because the mean of its divisors is an integer number (2942919000).

Almost surely, 2^21752372993 is an apocalyptic number.

It is an amenable number.

21752372993 is a deficient number, since it is larger than the sum of its proper divisors (1790979007).

21752372993 is a wasteful number, since it uses less digits than its factorization.

21752372993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408551.

The product of its digits is 1428840, while the sum is 50.

The spelling of 21752372993 in words is "twenty-one billion, seven hundred fifty-two million, three hundred seventy-two thousand, nine hundred ninety-three".