21814373 has 24 divisors (see below), whose sum is σ = 26862528. Its totient is φ = 17341632.

The previous prime is 21814369. The next prime is 21814379. The reversal of 21814373 is 37341812.

It is not a de Polignac number, because 21814373 - 2² = 21814369 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159161 + ... + 159297.

It is an arithmetic number, because the mean of its divisors is an integer number (1119272).

Almost surely, 2^21814373 is an apocalyptic number.

21814373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21814373 is a deficient number, since it is larger than the sum of its proper divisors (5048155).

21814373 is a wasteful number, since it uses less digits than its factorization.

21814373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 210 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 21814373 is about 4670.5859375457. The cubic root of 21814373 is about 279.4136240593.

The spelling of 21814373 in words is "twenty-one million, eight hundred fourteen thousand, three hundred seventy-three".