20015028 has 36 divisors (see below), whose sum is σ = 55194048. Its totient is φ = 6065040.

The previous prime is 20014993. The next prime is 20015029. The reversal of 20015028 is 82051002.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20015028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24876 + ... + 25667.

It is an arithmetic number, because the mean of its divisors is an integer number (1533168).

Almost surely, 2^20015028 is an apocalyptic number.

It is an amenable number.

20015028 is an abundant number, since it is smaller than the sum of its proper divisors (35179020).

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

20015028 is a wasteful number, since it uses less digits than its factorization.

20015028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50564 (or 50559 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20015028 is about 4473.8158209743. The cubic root of 20015028 is about 271.5097317513.

The spelling of 20015028 in words is "twenty million, fifteen thousand, twenty-eight".