18505703247020 has 24 divisors (see below), whose sum is σ = 42394883802768. Its totient is φ = 6729346635200.

The previous prime is 18505703247019. The next prime is 18505703247049. The reversal of 18505703247020 is 2074230750581.

It is a super-2 number, since 2×18505703247020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 42058416251 + ... + 42058416690.

It is an arithmetic number, because the mean of its divisors is an integer number (1766453491782).

Almost surely, 2^{18505703247020} is an apocalyptic number.

18505703247020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18505703247020 is an abundant number, since it is smaller than the sum of its proper divisors (23889180555748).

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

18505703247020 is a wasteful number, since it uses less digits than its factorization.

18505703247020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84116832961 (or 84116832959 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 18505703247020 in words is "eighteen trillion, five hundred five billion, seven hundred three million, two hundred forty-seven thousand, twenty".