18735495820 has 24 divisors (see below), whose sum is σ = 40701250800. Its totient is φ = 7235777472.

The previous prime is 18735495811. The next prime is 18735495829. The reversal of 18735495820 is 2859453781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18735495811) and next prime (18735495829).

It is not an unprimeable number, because it can be changed into a prime (18735495829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16150710 + ... + 16151869.

It is an arithmetic number, because the mean of its divisors is an integer number (1695885450).

Almost surely, 2^18735495820 is an apocalyptic number.

18735495820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18735495820 is an abundant number, since it is smaller than the sum of its proper divisors (21965754980).

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

18735495820 is a wasteful number, since it uses less digits than its factorization.

18735495820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32302617 (or 32302615 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 18735495820 in words is "eighteen billion, seven hundred thirty-five million, four hundred ninety-five thousand, eight hundred twenty".