20646463233 has 48 divisors (see below), whose sum is σ = 31109911488. Its totient is φ = 12078691200.

The previous prime is 20646463219. The next prime is 20646463267. The reversal of 20646463233 is 33236464602.

It is not a de Polignac number, because 20646463233 - 2⁴ = 20646463217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20646463191 and 20646463200.

It is not an unprimeable number, because it can be changed into a prime (20646463333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20708091 + ... + 20709087.

It is an arithmetic number, because the mean of its divisors is an integer number (648123156).

Almost surely, 2^20646463233 is an apocalyptic number.

It is an amenable number.

20646463233 is a deficient number, since it is larger than the sum of its proper divisors (10463448255).

20646463233 is a wasteful number, since it uses less digits than its factorization.

20646463233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 39.

The spelling of 20646463233 in words is "twenty billion, six hundred forty-six million, four hundred sixty-three thousand, two hundred thirty-three".