18400850720 has 48 divisors (see below), whose sum is σ = 49682299968. Its totient is φ = 6308862720.

The previous prime is 18400850651. The next prime is 18400850729. The reversal of 18400850720 is 2705800481.

It is a super-4 number, since 4×18400850720⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (18400850729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8213546 + ... + 8215785.

It is an arithmetic number, because the mean of its divisors is an integer number (1035047916).

Almost surely, 2^18400850720 is an apocalyptic number.

18400850720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18400850720 is an abundant number, since it is smaller than the sum of its proper divisors (31281449248).

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

18400850720 is a wasteful number, since it uses less digits than its factorization.

18400850720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16429353 (or 16429345 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The spelling of 18400850720 in words is "eighteen billion, four hundred million, eight hundred fifty thousand, seven hundred twenty".