21874773 has 8 divisors (see below), whose sum is σ = 29389536. Its totient is φ = 14471600.

The previous prime is 21874751. The next prime is 21874789. The reversal of 21874773 is 37747812.

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 21874773 - 2⁶ = 21874709 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 (21874673) 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, 27438 + ... + 28223.

It is an arithmetic number, because the mean of its divisors is an integer number (3673692).

Almost surely, 2^21874773 is an apocalyptic number.

It is an amenable number.

21874773 is a deficient number, since it is larger than the sum of its proper divisors (7514763).

21874773 is a wasteful number, since it uses less digits than its factorization.

21874773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55795.

The product of its digits is 65856, while the sum is 39.

The square root of 21874773 is about 4677.0474660837. The cubic root of 21874773 is about 279.6712681174.

The spelling of 21874773 in words is "twenty-one million, eight hundred seventy-four thousand, seven hundred seventy-three".