22671820 has 12 divisors (see below), whose sum is σ = 47610864. Its totient is φ = 9068720.

The previous prime is 22671799. The next prime is 22671821. The reversal of 22671820 is 2817622.

It is a super-2 number, since 2×22671820² = 1028022844224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22671821) 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, 566776 + ... + 566815.

It is an arithmetic number, because the mean of its divisors is an integer number (3967572).

Almost surely, 2^22671820 is an apocalyptic number.

22671820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22671820 is an abundant number, since it is smaller than the sum of its proper divisors (24939044).

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

22671820 is a wasteful number, since it uses less digits than its factorization.

22671820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133600 (or 1133598 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22671820 is about 4761.4934631899. The cubic root of 22671820 is about 283.0276040948.

The spelling of 22671820 in words is "twenty-two million, six hundred seventy-one thousand, eight hundred twenty".