20403066 has 16 divisors (see below), whose sum is σ = 42213600. Its totient is φ = 6566448.

The previous prime is 20403023. The next prime is 20403073. The reversal of 20403066 is 66030402.

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, 58456 + ... + 58803.

It is an arithmetic number, because the mean of its divisors is an integer number (2638350).

Almost surely, 2^20403066 is an apocalyptic number.

20403066 is an abundant number, since it is smaller than the sum of its proper divisors (21810534).

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

20403066 is a wasteful number, since it uses less digits than its factorization.

20403066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117293.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20403066 is about 4516.9753154074. The cubic root of 20403066 is about 273.2531296840.

Adding to 20403066 its reverse (66030402), we get a palindrome (86433468).

The spelling of 20403066 in words is "twenty million, four hundred three thousand, sixty-six".