21192328493 has 8 divisors (see below), whose sum is σ = 24320303040. Its totient is φ = 18089478720.

The previous prime is 21192328483. The next prime is 21192328511. The reversal of 21192328493 is 39482329112.

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 21192328493 - 2²² = 21188134189 is a prime.

It is a super-2 number, since 2×21192328493² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192328483) 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, 6279383 + ... + 6282756.

It is an arithmetic number, because the mean of its divisors is an integer number (3040037880).

Almost surely, 2^21192328493 is an apocalyptic number.

It is an amenable number.

21192328493 is a deficient number, since it is larger than the sum of its proper divisors (3127974547).

21192328493 is a wasteful number, since it uses less digits than its factorization.

21192328493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12562387.

The product of its digits is 186624, while the sum is 44.

The spelling of 21192328493 in words is "twenty-one billion, one hundred ninety-two million, three hundred twenty-eight thousand, four hundred ninety-three".