22524012021 has 16 divisors (see below), whose sum is σ = 34326255104. Its totient is φ = 12869382384.

The previous prime is 22524011989. The next prime is 22524012031. The reversal of 22524012021 is 12021042522.

It is not a de Polignac number, because 22524012021 - 2⁵ = 22524011989 is a prime.

It is a super-2 number, since 2×22524012021² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22524012031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140430 + ... + 254496.

It is an arithmetic number, because the mean of its divisors is an integer number (2145390944).

Almost surely, 2^22524012021 is an apocalyptic number.

22524012021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22524012021 is a deficient number, since it is larger than the sum of its proper divisors (11802243083).

22524012021 is a wasteful number, since it uses less digits than its factorization.

22524012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123480.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22524012021 its reverse (12021042522), we get a palindrome (34545054543).

The spelling of 22524012021 in words is "twenty-two billion, five hundred twenty-four million, twelve thousand, twenty-one".