18313533952 has 80 divisors (see below), whose sum is σ = 44019771840. Its totient is φ = 7435542528.

The previous prime is 18313533911. The next prime is 18313534013. The reversal of 18313533952 is 25933531381.

It is a super-2 number, since 2×18313533952² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18313533899 and 18313533908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66373 + ... + 202564.

It is an arithmetic number, because the mean of its divisors is an integer number (550247148).

Almost surely, 2^18313533952 is an apocalyptic number.

It is an amenable number.

18313533952 is an abundant number, since it is smaller than the sum of its proper divisors (25706237888).

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

18313533952 is an equidigital number, since it uses as much as digits as its factorization.

18313533952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268981 (or 268965 counting only the distinct ones).

The product of its digits is 291600, while the sum is 43.

The spelling of 18313533952 in words is "eighteen billion, three hundred thirteen million, five hundred thirty-three thousand, nine hundred fifty-two".