30993941 has 16 divisors (see below), whose sum is σ = 36158400. Its totient is φ = 26254080.

The previous prime is 30993931. The next prime is 30993947. The reversal of 30993941 is 14939903.

It is a cyclic number.

It is not a de Polignac number, because 30993941 - 2¹⁰ = 30992917 is a prime.

It is a super-2 number, since 2×30993941² = 1921248757422962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30993895 and 30993904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30993947) 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, 19235 + ... + 20783.

It is an arithmetic number, because the mean of its divisors is an integer number (2259900).

Almost surely, 2^30993941 is an apocalyptic number.

It is an amenable number.

30993941 is a deficient number, since it is larger than the sum of its proper divisors (5164459).

30993941 is a wasteful number, since it uses less digits than its factorization.

30993941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 30993941 is about 5567.2202219779. The cubic root of 30993941 is about 314.1175976418.

The spelling of 30993941 in words is "thirty million, nine hundred ninety-three thousand, nine hundred forty-one".