20887444 has 12 divisors (see below), whose sum is σ = 36601600. Its totient is φ = 10429848.

The previous prime is 20887439. The next prime is 20887457. The reversal of 20887444 is 44478802.

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, 397 + ... + 6475.

Almost surely, 2^20887444 is an apocalyptic number.

It is an amenable number.

20887444 is a deficient number, since it is larger than the sum of its proper divisors (15714156).

20887444 is a wasteful number, since it uses less digits than its factorization.

20887444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6942 (or 6940 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 20887444 is about 4570.2783285047. The cubic root of 20887444 is about 275.3986241022.

The spelling of 20887444 in words is "twenty million, eight hundred eighty-seven thousand, four hundred forty-four".