20815160 has 16 divisors (see below), whose sum is σ = 46834200. Its totient is φ = 8326048.

The previous prime is 20815159. The next prime is 20815169. The reversal of 20815160 is 6151802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20815169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260150 + ... + 260229.

Almost surely, 2^20815160 is an apocalyptic number.

20815160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20815160 is an abundant number, since it is smaller than the sum of its proper divisors (26019040).

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

20815160 is a wasteful number, since it uses less digits than its factorization.

20815160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520390 (or 520386 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 20815160 is about 4562.3634226133. The cubic root of 20815160 is about 275.0805714326.

Adding to 20815160 its reverse (6151802), we get a palindrome (26966962).

The spelling of 20815160 in words is "twenty million, eight hundred fifteen thousand, one hundred sixty".