21901375293 has 32 divisors (see below), whose sum is σ = 33595699200. Its totient is φ = 12432035520.

The previous prime is 21901375277. The next prime is 21901375319. The reversal of 21901375293 is 39257310912.

It is not a de Polignac number, because 21901375293 - 2⁴ = 21901375277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21901375193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1980646 + ... + 1991672.

It is an arithmetic number, because the mean of its divisors is an integer number (1049865600).

Almost surely, 2^21901375293 is an apocalyptic number.

It is an amenable number.

21901375293 is a deficient number, since it is larger than the sum of its proper divisors (11694323907).

21901375293 is a wasteful number, since it uses less digits than its factorization.

21901375293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11657.

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 21901375293 in words is "twenty-one billion, nine hundred one million, three hundred seventy-five thousand, two hundred ninety-three".