18823813632 has 120 divisors (see below), whose sum is σ = 58505971524. Its totient is φ = 5791924224.

The previous prime is 18823813621. The next prime is 18823813633. The reversal of 18823813632 is 23631832881.

18823813632 is a `hidden beast` number, since 1 + 8 + 8 + 2 + 3 + 8 + 1 + 3 + 632 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17767823616 + 1055990016 = 133296^2 + 32496^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18823813633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97213 + ... + 217020.

Almost surely, 2^18823813632 is an apocalyptic number.

18823813632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18823813632 is an abundant number, since it is smaller than the sum of its proper divisors (39682157892).

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

18823813632 is a wasteful number, since it uses less digits than its factorization.

18823813632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314270 (or 314251 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 18823813632 in words is "eighteen billion, eight hundred twenty-three million, eight hundred thirteen thousand, six hundred thirty-two".