21925893 has 8 divisors (see below), whose sum is σ = 31892256. Its totient is φ = 13288400.

The previous prime is 21925879. The next prime is 21925907. The reversal of 21925893 is 39852912.

It is an interprime number because it is at equal distance from previous prime (21925879) and next prime (21925907).

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 21925893 - 2⁸ = 21925637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21925853) 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, 332178 + ... + 332243.

It is an arithmetic number, because the mean of its divisors is an integer number (3986532).

Almost surely, 2^21925893 is an apocalyptic number.

It is an amenable number.

21925893 is a deficient number, since it is larger than the sum of its proper divisors (9966363).

21925893 is a wasteful number, since it uses less digits than its factorization.

21925893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664435.

The product of its digits is 38880, while the sum is 39.

The square root of 21925893 is about 4682.5092632049. The cubic root of 21925893 is about 279.8889568183. Note that the first 3 decimals are identical.

The spelling of 21925893 in words is "twenty-one million, nine hundred twenty-five thousand, eight hundred ninety-three".