18045850253820 has 48 divisors (see below), whose sum is σ = 50551131367968. Its totient is φ = 4810060005120.

The previous prime is 18045850253759. The next prime is 18045850253863. The reversal of 18045850253820 is 2835205854081.

It is a happy number.

It is a super-2 number, since 2×18045850253820² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67575919 + ... + 67842438.

It is an arithmetic number, because the mean of its divisors is an integer number (1053148570166).

Almost surely, 2^{18045850253820} is an apocalyptic number.

18045850253820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18045850253820 is an abundant number, since it is smaller than the sum of its proper divisors (32505281114148).

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

18045850253820 is a wasteful number, since it uses less digits than its factorization.

18045850253820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135420590 (or 135420588 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 51.

The spelling of 18045850253820 in words is "eighteen trillion, forty-five billion, eight hundred fifty million, two hundred fifty-three thousand, eight hundred twenty".