30481918 has 16 divisors (see below), whose sum is σ = 49138704. Its totient is φ = 14129280.

The previous prime is 30481907. The next prime is 30481931. The reversal of 30481918 is 81918403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 4413 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (3071169).

Almost surely, 2^30481918 is an apocalyptic number.

30481918 is a deficient number, since it is larger than the sum of its proper divisors (18656786).

30481918 is a wasteful number, since it uses less digits than its factorization.

30481918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13467.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 30481918 is about 5521.0431985269. The cubic root of 30481918 is about 312.3782326655.

The spelling of 30481918 in words is "thirty million, four hundred eighty-one thousand, nine hundred eighteen".