21342032291 has 8 divisors (see below), whose sum is σ = 21617248224. Its totient is φ = 21068124480.

The previous prime is 21342032279. The next prime is 21342032317. The reversal of 21342032291 is 19223024312.

It is a happy number.

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 21342032291 - 2²² = 21337837987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342032191) 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, 294170 + ... + 359471.

It is an arithmetic number, because the mean of its divisors is an integer number (2702156028).

Almost surely, 2^21342032291 is an apocalyptic number.

21342032291 is a deficient number, since it is larger than the sum of its proper divisors (275215933).

21342032291 is a wasteful number, since it uses less digits than its factorization.

21342032291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654061.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21342032291 in words is "twenty-one billion, three hundred forty-two million, thirty-two thousand, two hundred ninety-one".