18251202740 has 24 divisors (see below), whose sum is σ = 38333858472. Its totient is φ = 7299274880.

The previous prime is 18251202733. The next prime is 18251202841. The reversal of 18251202740 is 4720215281.

It can be written as a sum of positive squares in 4 ways, for example, as 3467560996 + 14783641744 = 58886^2 + 121588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18251202697 and 18251202706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54110 + ... + 198570.

It is an arithmetic number, because the mean of its divisors is an integer number (1597244103).

Almost surely, 2^18251202740 is an apocalyptic number.

18251202740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18251202740 is an abundant number, since it is smaller than the sum of its proper divisors (20082655732).

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

18251202740 is a wasteful number, since it uses less digits than its factorization.

18251202740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150787 (or 150785 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 18251202740 in words is "eighteen billion, two hundred fifty-one million, two hundred two thousand, seven hundred forty".