21873048 has 32 divisors (see below), whose sum is σ = 55848960. Its totient is φ = 7135520.

The previous prime is 21873043. The next prime is 21873053. The reversal of 21873048 is 84037812.

It is an interprime number because it is at equal distance from previous prime (21873043) and next prime (21873053).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21873043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8568 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (1745280).

Almost surely, 2^21873048 is an apocalyptic number.

It is an amenable number.

21873048 is an abundant number, since it is smaller than the sum of its proper divisors (33975912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21873048 is a wasteful number, since it uses less digits than its factorization.

21873048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19447 (or 19443 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 21873048 is about 4676.8630512342. The cubic root of 21873048 is about 279.6639164888.

The spelling of 21873048 in words is "twenty-one million, eight hundred seventy-three thousand, forty-eight".