20290960 has 20 divisors (see below), whose sum is σ = 47176668. Its totient is φ = 8116352.

The previous prime is 20290951. The next prime is 20290961. The reversal of 20290960 is 6909202.

It can be written as a sum of positive squares in 2 ways, for example, as 8785296 + 11505664 = 2964^2 + 3392^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (20290961) 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, 126739 + ... + 126898.

Almost surely, 2^20290960 is an apocalyptic number.

20290960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20290960 is an abundant number, since it is smaller than the sum of its proper divisors (26885708).

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

20290960 is a wasteful number, since it uses less digits than its factorization.

20290960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253650 (or 253644 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20290960 is about 4504.5488120343. The cubic root of 20290960 is about 272.7517411044.

The spelling of 20290960 in words is "twenty million, two hundred ninety thousand, nine hundred sixty".