20290160 has 40 divisors (see below), whose sum is σ = 51465456. Its totient is φ = 7377920.

The previous prime is 20290147. The next prime is 20290183. The reversal of 20290160 is 6109202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10649 + ... + 12408.

Almost surely, 2^20290160 is an apocalyptic number.

20290160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20290160 is an abundant number, since it is smaller than the sum of its proper divisors (31175296).

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

20290160 is a wasteful number, since it uses less digits than its factorization.

20290160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23081 (or 23075 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20290160 is about 4504.4600120325. The cubic root of 20290160 is about 272.7481565153.

Adding to 20290160 its reverse (6109202), we get a palindrome (26399362).

The spelling of 20290160 in words is "twenty million, two hundred ninety thousand, one hundred sixty".