21072184293 has 8 divisors (see below), whose sum is σ = 28096924768. Its totient is φ = 14047783344.

The previous prime is 21072184277. The next prime is 21072184303. The reversal of 21072184293 is 39248127012.

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

It is not a de Polignac number, because 21072184293 - 2⁴ = 21072184277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072185293) 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, 165171 + ... + 263487.

It is an arithmetic number, because the mean of its divisors is an integer number (3512115596).

Almost surely, 2^21072184293 is an apocalyptic number.

It is an amenable number.

21072184293 is a deficient number, since it is larger than the sum of its proper divisors (7024740475).

21072184293 is an equidigital number, since it uses as much as digits as its factorization.

21072184293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169763.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 21072184293 in words is "twenty-one billion, seventy-two million, one hundred eighty-four thousand, two hundred ninety-three".