30021438718 has 32 divisors (see below), whose sum is σ = 47765635200. Its totient is φ = 14112087264.

The previous prime is 30021438697. The next prime is 30021438749. The reversal of 30021438718 is 81783412003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2728953 + ... + 2739931.

It is an arithmetic number, because the mean of its divisors is an integer number (1492676100).

Almost surely, 2^30021438718 is an apocalyptic number.

30021438718 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

30021438718 is a deficient number, since it is larger than the sum of its proper divisors (17744196482).

30021438718 is a wasteful number, since it uses less digits than its factorization.

30021438718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11544.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 30021438718 in words is "thirty billion, twenty-one million, four hundred thirty-eight thousand, seven hundred eighteen".