20887324 has 12 divisors (see below), whose sum is σ = 36628200. Its totient is φ = 10422128.

The previous prime is 20887313. The next prime is 20887333. The reversal of 20887324 is 42378802.

It is a self number, because there is not a number n which added to its sum of digits gives 20887324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3094 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (3052350).

Almost surely, 2^20887324 is an apocalyptic number.

It is an amenable number.

20887324 is a deficient number, since it is larger than the sum of its proper divisors (15740876).

20887324 is a wasteful number, since it uses less digits than its factorization.

20887324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10772 (or 10770 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20887324 is about 4570.2652001826. The cubic root of 20887324 is about 275.3980967057.

The spelling of 20887324 in words is "twenty million, eight hundred eighty-seven thousand, three hundred twenty-four".