21873050 has 24 divisors (see below), whose sum is σ = 43078716. Its totient is φ = 8234240.

The previous prime is 21873043. The next prime is 21873053. The reversal of 21873050 is 5037812.

It can be written as a sum of positive squares in 6 ways, for example, as 5527201 + 16345849 = 2351^2 + 4043^2 .

It is not an unprimeable number, because it can be changed into a prime (21873053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12017 + ... + 13716.

Almost surely, 2^21873050 is an apocalyptic number.

21873050 is a deficient number, since it is larger than the sum of its proper divisors (21205666).

21873050 is a wasteful number, since it uses less digits than its factorization.

21873050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25762 (or 25757 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21873050 is about 4676.8632650528. The cubic root of 21873050 is about 279.6639250127.

The spelling of 21873050 in words is "twenty-one million, eight hundred seventy-three thousand, fifty".