20456203666 has 32 divisors (see below), whose sum is σ = 32734255680. Its totient is φ = 9554029056.

The previous prime is 20456203613. The next prime is 20456203667. The reversal of 20456203666 is 66630265402.

It is not an unprimeable number, because it can be changed into a prime (20456203667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4758430 + ... + 4762726.

It is an arithmetic number, because the mean of its divisors is an integer number (1022945490).

Almost surely, 2^20456203666 is an apocalyptic number.

20456203666 is a deficient number, since it is larger than the sum of its proper divisors (12278052014).

20456203666 is a wasteful number, since it uses less digits than its factorization.

20456203666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 20456203666 in words is "twenty billion, four hundred fifty-six million, two hundred three thousand, six hundred sixty-six".