30381830181921 has 16 divisors (see below), whose sum is σ = 40925234327040. Its totient is φ = 20046637267200.

The previous prime is 30381830181917. The next prime is 30381830181949. The reversal of 30381830181921 is 12918103818303.

It is not a de Polignac number, because 30381830181921 - 2² = 30381830181917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30381830181221) 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, 17614920 + ... + 19262633.

It is an arithmetic number, because the mean of its divisors is an integer number (2557827145440).

Almost surely, 2^{30381830181921} is an apocalyptic number.

It is an amenable number.

30381830181921 is a deficient number, since it is larger than the sum of its proper divisors (10543404145119).

30381830181921 is a wasteful number, since it uses less digits than its factorization.

30381830181921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36880376.

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 30381830181921 in words is "thirty trillion, three hundred eighty-one billion, eight hundred thirty million, one hundred eighty-one thousand, nine hundred twenty-one".