18740520507 has 8 divisors (see below), whose sum is σ = 25329653584. Its totient is φ = 12322533888.

The previous prime is 18740520499. The next prime is 18740520523. The reversal of 18740520507 is 70502504781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18740520507 - 2³ = 18740520499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18740520527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42786358 + ... + 42786795.

It is an arithmetic number, because the mean of its divisors is an integer number (3166206698).

Almost surely, 2^18740520507 is an apocalyptic number.

18740520507 is a deficient number, since it is larger than the sum of its proper divisors (6589133077).

18740520507 is an equidigital number, since it uses as much as digits as its factorization.

18740520507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85573229.

The product of its (nonzero) digits is 78400, while the sum is 39.

The spelling of 18740520507 in words is "eighteen billion, seven hundred forty million, five hundred twenty thousand, five hundred seven".