21266275762 has 4 divisors (see below), whose sum is σ = 31899413646. Its totient is φ = 10633137880.

The previous prime is 21266275759. The next prime is 21266275763. The reversal of 21266275762 is 26757266212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12478900681 + 8787375081 = 111709^2 + 93741^2 .

It is not an unprimeable number, because it can be changed into a prime (21266275763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5316568939 + ... + 5316568942.

Almost surely, 2^21266275762 is an apocalyptic number.

21266275762 is a deficient number, since it is larger than the sum of its proper divisors (10633137884).

21266275762 is a wasteful number, since it uses less digits than its factorization.

21266275762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633137883.

The product of its digits is 846720, while the sum is 46.

The spelling of 21266275762 in words is "twenty-one billion, two hundred sixty-six million, two hundred seventy-five thousand, seven hundred sixty-two".