21066262312 has 64 divisors (see below), whose sum is σ = 41870707200. Its totient is φ = 9908801280.

The previous prime is 21066262277. The next prime is 21066262313. The reversal of 21066262312 is 21326266012.

It is not an unprimeable number, because it can be changed into a prime (21066262313) 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, 25658862 + ... + 25659682.

It is an arithmetic number, because the mean of its divisors is an integer number (654229800).

Almost surely, 2^21066262312 is an apocalyptic number.

It is an amenable number.

21066262312 is a deficient number, since it is larger than the sum of its proper divisors (20804444888).

21066262312 is a wasteful number, since it uses less digits than its factorization.

21066262312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 21066262312 in words is "twenty-one billion, sixty-six million, two hundred sixty-two thousand, three hundred twelve".