21032074689 has 16 divisors (see below), whose sum is σ = 28244106240. Its totient is φ = 13920912720.

The previous prime is 21032074673. The next prime is 21032074691. The reversal of 21032074689 is 98647023012.

It is not a de Polignac number, because 21032074689 - 2⁴ = 21032074673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21032074689.

It is not an unprimeable number, because it can be changed into a prime (21032074699) 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, 405924 + ... + 454794.

It is an arithmetic number, because the mean of its divisors is an integer number (1765256640).

Almost surely, 2^21032074689 is an apocalyptic number.

It is an amenable number.

21032074689 is a deficient number, since it is larger than the sum of its proper divisors (7212031551).

21032074689 is a wasteful number, since it uses less digits than its factorization.

21032074689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49900.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 21032074689 in words is "twenty-one billion, thirty-two million, seventy-four thousand, six hundred eighty-nine".