20265290 has 16 divisors (see below), whose sum is σ = 36528840. Its totient is φ = 8094720.

The previous prime is 20265269. The next prime is 20265299. The reversal of 20265290 is 9256202.

It can be written as a sum of positive squares in 4 ways, for example, as 9916201 + 10349089 = 3149^2 + 3217^2 .

It is not an unprimeable number, because it can be changed into a prime (20265299) 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, 12866 + ... + 14354.

Almost surely, 2^20265290 is an apocalyptic number.

20265290 is a deficient number, since it is larger than the sum of its proper divisors (16263550).

20265290 is a wasteful number, since it uses less digits than its factorization.

20265290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20265290 is about 4501.6985683184. The cubic root of 20265290 is about 272.6366735766.

The spelling of 20265290 in words is "twenty million, two hundred sixty-five thousand, two hundred ninety".