22929021 has 8 divisors (see below), whose sum is σ = 33968960. Its totient is φ = 15285996.

The previous prime is 22929017. The next prime is 22929037. The reversal of 22929021 is 12092922.

It is not a de Polignac number, because 22929021 - 2² = 22929017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 849223 = 22929021 / (2 + 2 + 9 + 2 + 9 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22929001) 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, 424585 + ... + 424638.

It is an arithmetic number, because the mean of its divisors is an integer number (4246120).

Almost surely, 2^22929021 is an apocalyptic number.

It is an amenable number.

22929021 is a deficient number, since it is larger than the sum of its proper divisors (11039939).

22929021 is an equidigital number, since it uses as much as digits as its factorization.

22929021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849232 (or 849226 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 22929021 is about 4788.4257329523. The cubic root of 22929021 is about 284.0938532962.

The spelling of 22929021 in words is "twenty-two million, nine hundred twenty-nine thousand, twenty-one".