18250374640 has 20 divisors (see below), whose sum is σ = 42432121224. Its totient is φ = 7300149824.

The previous prime is 18250374629. The next prime is 18250374641. The reversal of 18250374640 is 4647305281.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 18250374593 and 18250374602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18250374641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114064762 + ... + 114064921.

Almost surely, 2^18250374640 is an apocalyptic number.

18250374640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18250374640 is an abundant number, since it is smaller than the sum of its proper divisors (24181746584).

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

18250374640 is a wasteful number, since it uses less digits than its factorization.

18250374640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228129696 (or 228129690 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 18250374640 in words is "eighteen billion, two hundred fifty million, three hundred seventy-four thousand, six hundred forty".