21704815033 has 8 divisors (see below), whose sum is σ = 23693070816. Its totient is φ = 19719074400.

The previous prime is 21704815001. The next prime is 21704815037. The reversal of 21704815033 is 33051840712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21704815033 - 2⁵ = 21704815001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21704815033.

It is not an unprimeable number, because it can be changed into a prime (21704815037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610716 + ... + 645277.

It is an arithmetic number, because the mean of its divisors is an integer number (2961633852).

Almost surely, 2^21704815033 is an apocalyptic number.

It is an amenable number.

21704815033 is a deficient number, since it is larger than the sum of its proper divisors (1988255783).

21704815033 is a wasteful number, since it uses less digits than its factorization.

21704815033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257575.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 21704815033 in words is "twenty-one billion, seven hundred four million, eight hundred fifteen thousand, thirty-three".