22540342021 has 8 divisors (see below), whose sum is σ = 23180393984. Its totient is φ = 21901914000.

The previous prime is 22540341977. The next prime is 22540342031. The reversal of 22540342021 is 12024304522.

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 22540342021 - 2²³ = 22531953413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540342031) 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, 377805 + ... + 433378.

It is an arithmetic number, because the mean of its divisors is an integer number (2897549248).

Almost surely, 2^22540342021 is an apocalyptic number.

It is an amenable number.

22540342021 is a deficient number, since it is larger than the sum of its proper divisors (640051963).

22540342021 is an equidigital number, since it uses as much as digits as its factorization.

22540342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811971.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 22540342021 its reverse (12024304522), we get a palindrome (34564646543).

The spelling of 22540342021 in words is "twenty-two billion, five hundred forty million, three hundred forty-two thousand, twenty-one".