38581820012 has 6 divisors (see below), whose sum is σ = 67518185028. Its totient is φ = 19290910004.

The previous prime is 38581819993. The next prime is 38581820021. The reversal of 38581820012 is 21002818583.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4822727498 + ... + 4822727505.

It is an arithmetic number, because the mean of its divisors is an integer number (11253030838).

Almost surely, 2^38581820012 is an apocalyptic number.

It is an amenable number.

38581820012 is a deficient number, since it is larger than the sum of its proper divisors (28936365016).

38581820012 is a wasteful number, since it uses less digits than its factorization.

38581820012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9645455007 (or 9645455005 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 38581820012 in words is "thirty-eight billion, five hundred eighty-one million, eight hundred twenty thousand, twelve".