22542637 has 4 divisors (see below), whose sum is σ = 24276700. Its totient is φ = 20808576.

The previous prime is 22542631. The next prime is 22542671. The reversal of 22542637 is 73624522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 14891881 = 2766^2 + 3859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22542637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22542599 and 22542608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22542631) 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, 867012 + ... + 867037.

It is an arithmetic number, because the mean of its divisors is an integer number (6069175).

Almost surely, 2^22542637 is an apocalyptic number.

It is an amenable number.

22542637 is a deficient number, since it is larger than the sum of its proper divisors (1734063).

22542637 is a wasteful number, since it uses less digits than its factorization.

22542637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734062.

The product of its digits is 20160, while the sum is 31.

The square root of 22542637 is about 4747.9086975215. The cubic root of 22542637 is about 282.4890203789.

The spelling of 22542637 in words is "twenty-two million, five hundred forty-two thousand, six hundred thirty-seven".