20266694956 has 12 divisors (see below), whose sum is σ = 35468129592. Its totient is φ = 10132943648.

The previous prime is 20266694947. The next prime is 20266694969. The reversal of 20266694956 is 65949666202.

It is a junction number, because it is equal to n+sod(n) for n = 20266694897 and 20266694906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31176 + ... + 203728.

It is an arithmetic number, because the mean of its divisors is an integer number (2955677466).

Almost surely, 2^20266694956 is an apocalyptic number.

It is an amenable number.

20266694956 is a deficient number, since it is larger than the sum of its proper divisors (15201434636).

20266694956 is a wasteful number, since it uses less digits than its factorization.

20266694956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201920 (or 201918 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 20266694956 in words is "twenty billion, two hundred sixty-six million, six hundred ninety-four thousand, nine hundred fifty-six".