21925373 has 4 divisors (see below), whose sum is σ = 23079360. Its totient is φ = 20771388.

The previous prime is 21925369. The next prime is 21925429. The reversal of 21925373 is 37352912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21925373 - 2² = 21925369 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21925303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576965 + ... + 577002.

It is an arithmetic number, because the mean of its divisors is an integer number (5769840).

Almost surely, 2^21925373 is an apocalyptic number.

It is an amenable number.

21925373 is a deficient number, since it is larger than the sum of its proper divisors (1153987).

21925373 is a wasteful number, since it uses less digits than its factorization.

21925373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153986.

The product of its digits is 11340, while the sum is 32.

The square root of 21925373 is about 4682.4537370913. The cubic root of 21925373 is about 279.8867441619.

The spelling of 21925373 in words is "twenty-one million, nine hundred twenty-five thousand, three hundred seventy-three".