22494420 has 72 divisors (see below), whose sum is σ = 73489416. Its totient is φ = 5536512.

The previous prime is 22494377. The next prime is 22494457. The reversal of 22494420 is 2449422.

It can be written as a sum of positive squares in 4 ways, for example, as 4955076 + 17539344 = 2226^2 + 4188^2 .

It is a super-2 number, since 2×22494420² = 1011997862272800, which contains 22 as substring.

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2467 + ... + 7146.

Almost surely, 2^22494420 is an apocalyptic number.

22494420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22494420 is an abundant number, since it is smaller than the sum of its proper divisors (50994996).

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

22494420 is a wasteful number, since it uses less digits than its factorization.

22494420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9641 (or 9636 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22494420 is about 4742.8282701359. The cubic root of 22494420 is about 282.2874690413.

The spelling of 22494420 in words is "twenty-two million, four hundred ninety-four thousand, four hundred twenty".