21393692033 has 8 divisors (see below), whose sum is σ = 24692013120. Its totient is φ = 18155890800.

The previous prime is 21393692017. The next prime is 21393692057. The reversal of 21393692033 is 33029639312.

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 21393692033 - 2⁴ = 21393692017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21393692233) 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, 15129203 + ... + 15130616.

It is an arithmetic number, because the mean of its divisors is an integer number (3086501640).

Almost surely, 2^21393692033 is an apocalyptic number.

It is an amenable number.

21393692033 is a deficient number, since it is larger than the sum of its proper divisors (3298321087).

21393692033 is a wasteful number, since it uses less digits than its factorization.

21393692033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30259927.

The product of its (nonzero) digits is 157464, while the sum is 41.

The spelling of 21393692033 in words is "twenty-one billion, three hundred ninety-three million, six hundred ninety-two thousand, thirty-three".