20015502 has 16 divisors (see below), whose sum is σ = 43110480. Its totient is φ = 6158592.

The previous prime is 20015461. The next prime is 20015507. The reversal of 20015502 is 20551002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015507) 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, 128227 + ... + 128382.

It is an arithmetic number, because the mean of its divisors is an integer number (2694405).

Almost surely, 2^20015502 is an apocalyptic number.

20015502 is an abundant number, since it is smaller than the sum of its proper divisors (23094978).

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

20015502 is a wasteful number, since it uses less digits than its factorization.

20015502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256627.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20015502 is about 4473.8687955728. The cubic root of 20015502 is about 271.5118750508.

Adding to 20015502 its reverse (20551002), we get a palindrome (40566504).

It can be divided in two parts, 2001 and 5502, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20015502 in words is "twenty million, fifteen thousand, five hundred two".