18698645137020 has 48 divisors (see below), whose sum is σ = 52356414018048. Its totient is φ = 4986285595200.

The previous prime is 18698645136961. The next prime is 18698645137021. The reversal of 18698645137020 is 2073154689681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18698645137021) 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, 20735577 + ... + 21618543.

It is an arithmetic number, because the mean of its divisors is an integer number (1090758625376).

It is a 1-persistent number, because it is pandigital, but 2⋅18698645137020 = 37397290274040 is not.

Almost surely, 2^{18698645137020} is an apocalyptic number.

18698645137020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18698645137020 is an abundant number, since it is smaller than the sum of its proper divisors (33657768881028).

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

18698645137020 is a wasteful number, since it uses less digits than its factorization.

18698645137020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235930 (or 1235928 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 18698645137020 in words is "eighteen trillion, six hundred ninety-eight billion, six hundred forty-five million, one hundred thirty-seven thousand, twenty".