21792534371 has 4 divisors (see below), whose sum is σ = 21807786000. Its totient is φ = 21777282744.

The previous prime is 21792534347. The next prime is 21792534419. The reversal of 21792534371 is 17343529712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21792534371 - 2¹⁴ = 21792517987 is a prime.

It is a super-2 number, since 2×21792534371² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21792534301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7623671 + ... + 7626528.

It is an arithmetic number, because the mean of its divisors is an integer number (5451946500).

Almost surely, 2^21792534371 is an apocalyptic number.

21792534371 is a deficient number, since it is larger than the sum of its proper divisors (15251629).

21792534371 is a wasteful number, since it uses less digits than its factorization.

21792534371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15251628.

The product of its digits is 317520, while the sum is 44.

The spelling of 21792534371 in words is "twenty-one billion, seven hundred ninety-two million, five hundred thirty-four thousand, three hundred seventy-one".