21793270345 has 32 divisors (see below), whose sum is σ = 32620778496. Its totient is φ = 13578840000.

The previous prime is 21793270321. The next prime is 21793270361. The reversal of 21793270345 is 54307239712.

It is not a de Polignac number, because 21793270345 - 2¹⁹ = 21792746057 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854062 + ... + 879208.

It is an arithmetic number, because the mean of its divisors is an integer number (1019399328).

Almost surely, 2^21793270345 is an apocalyptic number.

It is an amenable number.

21793270345 is a deficient number, since it is larger than the sum of its proper divisors (10827508151).

21793270345 is a wasteful number, since it uses less digits than its factorization.

21793270345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27421.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 21793270345 in words is "twenty-one billion, seven hundred ninety-three million, two hundred seventy thousand, three hundred forty-five".