21900373 has 8 divisors (see below), whose sum is σ = 24447456. Its totient is φ = 19446000.

The previous prime is 21900371. The next prime is 21900377. The reversal of 21900373 is 37300912.

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 21900373 - 2¹ = 21900371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21900371) 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, 22678 + ... + 23623.

It is an arithmetic number, because the mean of its divisors is an integer number (3055932).

Almost surely, 2^21900373 is an apocalyptic number.

It is an amenable number.

21900373 is a deficient number, since it is larger than the sum of its proper divisors (2547083).

21900373 is a wasteful number, since it uses less digits than its factorization.

21900373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46355.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 21900373 is about 4679.7834351602. The cubic root of 21900373 is about 279.7803251475.

The spelling of 21900373 in words is "twenty-one million, nine hundred thousand, three hundred seventy-three".