22863721 has 4 divisors (see below), whose sum is σ = 22874752. Its totient is φ = 22852692.

The previous prime is 22863713. The next prime is 22863727. The reversal of 22863721 is 12736822.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22863721 - 2³ = 22863713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22863727) 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, 1365 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (5718688).

Almost surely, 2^22863721 is an apocalyptic number.

It is an amenable number.

22863721 is a deficient number, since it is larger than the sum of its proper divisors (11031).

22863721 is an equidigital number, since it uses as much as digits as its factorization.

22863721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030.

The product of its digits is 8064, while the sum is 31.

The square root of 22863721 is about 4781.6023464943. The cubic root of 22863721 is about 283.8239047533.

The spelling of 22863721 in words is "twenty-two million, eight hundred sixty-three thousand, seven hundred twenty-one".