38218385820 has 24 divisors (see below), whose sum is σ = 107011480464. Its totient is φ = 10191569536.

The previous prime is 38218385789. The next prime is 38218385869. The reversal of 38218385820 is 2858381283.

It is a self number, because there is not a number n which added to its sum of digits gives 38218385820.

It is a congruent number.

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, 318486489 + ... + 318486608.

It is an arithmetic number, because the mean of its divisors is an integer number (4458811686).

Almost surely, 2^38218385820 is an apocalyptic number.

38218385820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38218385820 is an abundant number, since it is smaller than the sum of its proper divisors (68793094644).

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

38218385820 is a wasteful number, since it uses less digits than its factorization.

38218385820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636973109 (or 636973107 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 38218385820 in words is "thirty-eight billion, two hundred eighteen million, three hundred eighty-five thousand, eight hundred twenty".