20028995 has 24 divisors (see below), whose sum is σ = 28933200. Its totient is φ = 13255872.

The previous prime is 20028991. The next prime is 20028997. The reversal of 20028995 is 59982002.

It is not a de Polignac number, because 20028995 - 2² = 20028991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (20028991) 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, 5696 + ... + 8514.

It is an arithmetic number, because the mean of its divisors is an integer number (1205550).

Almost surely, 2^20028995 is an apocalyptic number.

20028995 is a deficient number, since it is larger than the sum of its proper divisors (8904205).

20028995 is a wasteful number, since it uses less digits than its factorization.

20028995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20028995 is about 4475.3765204729. The cubic root of 20028995 is about 271.5728725519.

The spelling of 20028995 in words is "twenty million, twenty-eight thousand, nine hundred ninety-five".