22492021 has 2 divisors, whose sum is σ = 22492022. Its totient is φ = 22492020.

The previous prime is 22492013. The next prime is 22492031. The reversal of 22492021 is 12029422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 2340900 = 4489^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 22492021 - 2³ = 22492013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22491983 and 22492001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22492031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11246010 + 11246011.

It is an arithmetic number, because the mean of its divisors is an integer number (11246011).

Almost surely, 2^22492021 is an apocalyptic number.

It is an amenable number.

22492021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22492021 is an equidigital number, since it uses as much as digits as its factorization.

22492021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 22492021 is about 4742.5753552263. The cubic root of 22492021 is about 282.2774334900.

The spelling of 22492021 in words is "twenty-two million, four hundred ninety-two thousand, twenty-one".