18472338450 has 72 divisors (see below), whose sum is σ = 51786828288. Its totient is φ = 4711782240.

The previous prime is 18472338433. The next prime is 18472338457. The reversal of 18472338450 is 5483327481.

It is a super-2 number, since 2×18472338450² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18472338396 and 18472338405.

It is not an unprimeable number, because it can be changed into a prime (18472338457) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 882034 + ... + 902733.

It is an arithmetic number, because the mean of its divisors is an integer number (719261504).

Almost surely, 2^18472338450 is an apocalyptic number.

18472338450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18472338450 is an abundant number, since it is smaller than the sum of its proper divisors (33314489838).

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

18472338450 is a wasteful number, since it uses less digits than its factorization.

18472338450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784808 (or 1784800 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 18472338450 in words is "eighteen billion, four hundred seventy-two million, three hundred thirty-eight thousand, four hundred fifty".