20102590 has 16 divisors (see below), whose sum is σ = 36333360. Its totient is φ = 8008000.

The previous prime is 20102573. The next prime is 20102591. The reversal of 20102590 is 9520102.

It is a super-2 number, since 2×20102590² = 808228249416200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102591) 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, 1495 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (2270835).

Almost surely, 2^20102590 is an apocalyptic number.

20102590 is a deficient number, since it is larger than the sum of its proper divisors (16230770).

20102590 is a wasteful number, since it uses less digits than its factorization.

20102590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20102590 is about 4483.5911945671. The cubic root of 20102590 is about 271.9050905172.

Adding to 20102590 its reverse (9520102), we get a palindrome (29622692).

The spelling of 20102590 in words is "twenty million, one hundred two thousand, five hundred ninety".