20266404663 has 16 divisors (see below), whose sum is σ = 28465747200. Its totient is φ = 12790082880.

The previous prime is 20266404643. The next prime is 20266404671. The reversal of 20266404663 is 36640466202.

It is a happy number.

It is not a de Polignac number, because 20266404663 - 2⁸ = 20266404407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266404643) 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, 59598 + ... + 209963.

It is an arithmetic number, because the mean of its divisors is an integer number (1779109200).

Almost surely, 2^20266404663 is an apocalyptic number.

20266404663 is a deficient number, since it is larger than the sum of its proper divisors (8199342537).

20266404663 is a wasteful number, since it uses less digits than its factorization.

20266404663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270902.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 20266404663 in words is "twenty billion, two hundred sixty-six million, four hundred four thousand, six hundred sixty-three".