22494913 has 4 divisors (see below), whose sum is σ = 25708480. Its totient is φ = 19281348.

The previous prime is 22494907. The next prime is 22494929. The reversal of 22494913 is 31949422.

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 an emirpimes, since its reverse is a distinct semiprime: 31949422 = 2 ⋅15974711.

It is a cyclic number.

It is not a de Polignac number, because 22494913 - 2⁵ = 22494881 is a prime.

It is a super-2 number, since 2×22494913² = 1012042221755138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22494973) 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, 1606773 + ... + 1606786.

It is an arithmetic number, because the mean of its divisors is an integer number (6427120).

Almost surely, 2^22494913 is an apocalyptic number.

It is an amenable number.

22494913 is a deficient number, since it is larger than the sum of its proper divisors (3213567).

22494913 is an equidigital number, since it uses as much as digits as its factorization.

22494913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213566.

The product of its digits is 15552, while the sum is 34.

The square root of 22494913 is about 4742.8802430591. The cubic root of 22494913 is about 282.2895312817.

The spelling of 22494913 in words is "twenty-two million, four hundred ninety-four thousand, nine hundred thirteen".