21205823282572 has 12 divisors (see below), whose sum is σ = 37359252428400. Its totient is φ = 10531751160176.

The previous prime is 21205823282563. The next prime is 21205823282573. The reversal of 21205823282572 is 27528232850212.

It is not an unprimeable number, because it can be changed into a prime (21205823282573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17790119608 + ... + 17790120799.

It is an arithmetic number, because the mean of its divisors is an integer number (3113271035700).

Almost surely, 2^{21205823282572} is an apocalyptic number.

It is an amenable number.

21205823282572 is a deficient number, since it is larger than the sum of its proper divisors (16153429145828).

21205823282572 is a wasteful number, since it uses less digits than its factorization.

21205823282572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35580240560 (or 35580240558 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 49.

The spelling of 21205823282572 in words is "twenty-one trillion, two hundred five billion, eight hundred twenty-three million, two hundred eighty-two thousand, five hundred seventy-two".