21933049 has 8 divisors (see below), whose sum is σ = 23220000. Its totient is φ = 20659392.

The previous prime is 21933047. The next prime is 21933061. The reversal of 21933049 is 94033912.

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 21933049 - 2¹ = 21933047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21933049.

It is not an unprimeable number, because it can be changed into a prime (21933047) 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, 177 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (2902500).

Almost surely, 2^21933049 is an apocalyptic number.

It is an amenable number.

21933049 is a deficient number, since it is larger than the sum of its proper divisors (1286951).

21933049 is a wasteful number, since it uses less digits than its factorization.

21933049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 21933049 is about 4683.2733210864. The cubic root of 21933049 is about 279.9194028230.

The spelling of 21933049 in words is "twenty-one million, nine hundred thirty-three thousand, forty-nine".