22024856021 has 4 divisors (see below), whose sum is σ = 25171264032. Its totient is φ = 18878448012.

The previous prime is 22024855967. The next prime is 22024856047. The reversal of 22024856021 is 12065842022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22024856021 - 2²² = 22020661717 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 (22024856071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1573203995 + ... + 1573204008.

It is an arithmetic number, because the mean of its divisors is an integer number (6292816008).

Almost surely, 2^22024856021 is an apocalyptic number.

It is an amenable number.

22024856021 is a deficient number, since it is larger than the sum of its proper divisors (3146408011).

22024856021 is an equidigital number, since it uses as much as digits as its factorization.

22024856021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146408010.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 22024856021 in words is "twenty-two billion, twenty-four million, eight hundred fifty-six thousand, twenty-one".