20887068 has 12 divisors (see below), whose sum is σ = 48736520. Its totient is φ = 6962352.

The previous prime is 20887063. The next prime is 20887079. The reversal of 20887068 is 86078802.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870283 + ... + 870306.

Almost surely, 2^20887068 is an apocalyptic number.

It is an amenable number.

20887068 is an abundant number, since it is smaller than the sum of its proper divisors (27849452).

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

20887068 is a wasteful number, since it uses less digits than its factorization.

20887068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740596 (or 1740594 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 20887068 is about 4570.2371929693. The cubic root of 20887068 is about 275.3969715862.

The spelling of 20887068 in words is "twenty million, eight hundred eighty-seven thousand, sixty-eight".