20887075 has 24 divisors (see below), whose sum is σ = 28498176. Its totient is φ = 15060000.

The previous prime is 20887063. The next prime is 20887079. The reversal of 20887075 is 57078802.

It is not a de Polignac number, because 20887075 - 2⁹ = 20886563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20887079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41274 + ... + 41776.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^20887075 is an apocalyptic number.

20887075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20887075 is a deficient number, since it is larger than the sum of its proper divisors (7611101).

20887075 is a wasteful number, since it uses less digits than its factorization.

20887075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 20887075 is about 4570.2379587938. The cubic root of 20887075 is about 275.3970023514.

The spelling of 20887075 in words is "twenty million, eight hundred eighty-seven thousand, seventy-five".