22920861 has 4 divisors (see below), whose sum is σ = 30561152. Its totient is φ = 15280572.

The previous prime is 22920853. The next prime is 22920881. The reversal of 22920861 is 16802922.

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 not a de Polignac number, because 22920861 - 2³ = 22920853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22920841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3820141 + ... + 3820146.

It is an arithmetic number, because the mean of its divisors is an integer number (7640288).

Almost surely, 2^22920861 is an apocalyptic number.

It is an amenable number.

22920861 is a deficient number, since it is larger than the sum of its proper divisors (7640291).

22920861 is an equidigital number, since it uses as much as digits as its factorization.

22920861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640290.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 22920861 is about 4787.5736025674. The cubic root of 22920861 is about 284.0601481081.

The spelling of 22920861 in words is "twenty-two million, nine hundred twenty thousand, eight hundred sixty-one".