30181900 has 36 divisors (see below), whose sum is σ = 74852848. Its totient is φ = 10347840.

The previous prime is 30181897. The next prime is 30181901. The reversal of 30181900 is 918103.

It is a super-2 number, since 2×30181900² = 1821894175220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30181901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20859 + ... + 22258.

Almost surely, 2^30181900 is an apocalyptic number.

It is an amenable number.

30181900 is an abundant number, since it is smaller than the sum of its proper divisors (44670948).

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

30181900 is a wasteful number, since it uses less digits than its factorization.

30181900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43138 (or 43131 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 30181900 is about 5493.8056026765. The cubic root of 30181900 is about 311.3499917977.

The spelling of 30181900 in words is "thirty million, one hundred eighty-one thousand, nine hundred".