18740759640 has 64 divisors (see below), whose sum is σ = 56366949600. Its totient is φ = 4984676352.

The previous prime is 18740759633. The next prime is 18740759647. The reversal of 18740759640 is 4695704781.

It is an interprime number because it is at equal distance from previous prime (18740759633) and next prime (18740759647).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740759647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154057 + ... + 247416.

Almost surely, 2^18740759640 is an apocalyptic number.

18740759640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18740759640 is an abundant number, since it is smaller than the sum of its proper divisors (37626189960).

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

18740759640 is a wasteful number, since it uses less digits than its factorization.

18740759640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401876 (or 401872 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 18740759640 in words is "eighteen billion, seven hundred forty million, seven hundred fifty-nine thousand, six hundred forty".