18823812 has 48 divisors (see below), whose sum is σ = 50440320. Its totient is φ = 5352192.

The previous prime is 18823799. The next prime is 18823841. The reversal of 18823812 is 21832881.

It is a super-2 number, since 2×18823812² = 708671796422688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22864 + ... + 23672.

It is an arithmetic number, because the mean of its divisors is an integer number (1050840).

Almost surely, 2^18823812 is an apocalyptic number.

18823812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18823812 is an abundant number, since it is smaller than the sum of its proper divisors (31616508).

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

18823812 is a wasteful number, since it uses less digits than its factorization.

18823812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1098 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 18823812 is about 4338.6417229359. The cubic root of 18823812 is about 266.0127945303.

The spelling of 18823812 in words is "eighteen million, eight hundred twenty-three thousand, eight hundred twelve".