20887368 has 32 divisors (see below), whose sum is σ = 53494560. Its totient is φ = 6792320.

The previous prime is 20887367. The next prime is 20887393. The reversal of 20887368 is 86378802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9630 + ... + 11597.

It is an arithmetic number, because the mean of its divisors is an integer number (1671705).

Almost surely, 2^20887368 is an apocalyptic number.

It is an amenable number.

20887368 is an abundant number, since it is smaller than the sum of its proper divisors (32607192).

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

20887368 is a wasteful number, since it uses less digits than its factorization.

20887368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21277 (or 21273 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 20887368 is about 4570.2700139051. The cubic root of 20887368 is about 275.3982900846.

The spelling of 20887368 in words is "twenty million, eight hundred eighty-seven thousand, three hundred sixty-eight".