18547211952 has 40 divisors (see below), whose sum is σ = 53237368880. Its totient is φ = 6182403840.

The previous prime is 18547211923. The next prime is 18547211959. The reversal of 18547211952 is 25911274581.

18547211952 is a `hidden beast` number, since 1 + 8 + 547 + 2 + 11 + 95 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18547211898 and 18547211907.

It is not an unprimeable number, because it can be changed into a prime (18547211959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21466249 + ... + 21467112.

It is an arithmetic number, because the mean of its divisors is an integer number (1330934222).

Almost surely, 2^18547211952 is an apocalyptic number.

18547211952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18547211952 is an abundant number, since it is smaller than the sum of its proper divisors (34690156928).

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

18547211952 is a wasteful number, since it uses less digits than its factorization.

18547211952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42933378 (or 42933366 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The spelling of 18547211952 in words is "eighteen billion, five hundred forty-seven million, two hundred eleven thousand, nine hundred fifty-two".