20403268 has 6 divisors (see below), whose sum is σ = 35705726. Its totient is φ = 10201632.

The previous prime is 20403241. The next prime is 20403293. The reversal of 20403268 is 86230402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 2408704 = 4242^2 + 1552^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550405 + ... + 2550412.

Almost surely, 2^20403268 is an apocalyptic number.

It is an amenable number.

20403268 is a deficient number, since it is larger than the sum of its proper divisors (15302458).

20403268 is a wasteful number, since it uses less digits than its factorization.

20403268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100821 (or 5100819 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20403268 is about 4516.9976754477. The cubic root of 20403268 is about 273.2540314594.

The spelling of 20403268 in words is "twenty million, four hundred three thousand, two hundred sixty-eight".