21930113 has 8 divisors (see below), whose sum is σ = 22713600. Its totient is φ = 21151440.

The previous prime is 21930107. The next prime is 21930131. The reversal of 21930113 is 31103912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21930113 - 2¹⁴ = 21913729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21930143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9806 + ... + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (2839200).

Almost surely, 2^21930113 is an apocalyptic number.

It is an amenable number.

21930113 is a deficient number, since it is larger than the sum of its proper divisors (783487).

21930113 is a wasteful number, since it uses less digits than its factorization.

21930113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 21930113 is about 4682.9598546219. The cubic root of 21930113 is about 279.9069120829.

The spelling of 21930113 in words is "twenty-one million, nine hundred thirty thousand, one hundred thirteen".