22542420 has 24 divisors (see below), whose sum is σ = 63118944. Its totient is φ = 6011296.

The previous prime is 22542409. The next prime is 22542433. The reversal of 22542420 is 2424522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187794 + ... + 187913.

It is an arithmetic number, because the mean of its divisors is an integer number (2629956).

Almost surely, 2^22542420 is an apocalyptic number.

22542420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22542420 is an abundant number, since it is smaller than the sum of its proper divisors (40576524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22542420 is a wasteful number, since it uses less digits than its factorization.

22542420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375719 (or 375717 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22542420 is about 4747.8858453000. The cubic root of 22542420 is about 282.4881139437.

Adding to 22542420 its reverse (2424522), we get a palindrome (24966942).

The spelling of 22542420 in words is "twenty-two million, five hundred forty-two thousand, four hundred twenty".