20887432 has 8 divisors (see below), whose sum is σ = 39163950. Its totient is φ = 10443712.

The previous prime is 20887423. The next prime is 20887439. The reversal of 20887432 is 23478802.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 9771876 = 3334^2 + 3126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20887439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305457 + ... + 1305472.

Almost surely, 2^20887432 is an apocalyptic number.

It is an amenable number.

20887432 is a deficient number, since it is larger than the sum of its proper divisors (18276518).

20887432 is a wasteful number, since it uses less digits than its factorization.

20887432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610935 (or 2610931 counting only the distinct ones).

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

The square root of 20887432 is about 4570.2770156742. The cubic root of 20887432 is about 275.3985713626.

The spelling of 20887432 in words is "twenty million, eight hundred eighty-seven thousand, four hundred thirty-two".