20887892 has 6 divisors (see below), whose sum is σ = 36553818. Its totient is φ = 10443944.

The previous prime is 20887891. The next prime is 20887903. The reversal of 20887892 is 29878802.

It can be written as a sum of positive squares in only one way, i.e., 15888196 + 4999696 = 3986^2 + 2236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610983 + ... + 2610990.

It is an arithmetic number, because the mean of its divisors is an integer number (6092303).

Almost surely, 2^20887892 is an apocalyptic number.

It is an amenable number.

20887892 is a deficient number, since it is larger than the sum of its proper divisors (15665926).

20887892 is a wasteful number, since it uses less digits than its factorization.

20887892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221977 (or 5221975 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 20887892 is about 4570.3273405742. The cubic root of 20887892 is about 275.4005930315.

The spelling of 20887892 in words is "twenty million, eight hundred eighty-seven thousand, eight hundred ninety-two".