22920431 has 2 divisors, whose sum is σ = 22920432. Its totient is φ = 22920430.

The previous prime is 22920409. The next prime is 22920449. The reversal of 22920431 is 13402922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22920431 - 2¹⁴ = 22904047 is a prime.

It is a super-2 number, since 2×22920431² = 1050692314451522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22920397 and 22920406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22920461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460215 + 11460216.

It is an arithmetic number, because the mean of its divisors is an integer number (11460216).

Almost surely, 2^22920431 is an apocalyptic number.

22920431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22920431 is an equidigital number, since it uses as much as digits as its factorization.

22920431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 22920431 is about 4787.5286944310. The cubic root of 22920431 is about 284.0583717550.

The spelling of 22920431 in words is "twenty-two million, nine hundred twenty thousand, four hundred thirty-one".