21192591453 has 8 divisors (see below), whose sum is σ = 30825587616. Its totient is φ = 12843994800.

The previous prime is 21192591451. The next prime is 21192591457. The reversal of 21192591453 is 35419529112.

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

It is not a de Polignac number, because 21192591453 - 2¹ = 21192591451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192591451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321099838 + ... + 321099903.

It is an arithmetic number, because the mean of its divisors is an integer number (3853198452).

Almost surely, 2^21192591453 is an apocalyptic number.

It is an amenable number.

21192591453 is a deficient number, since it is larger than the sum of its proper divisors (9632996163).

21192591453 is a wasteful number, since it uses less digits than its factorization.

21192591453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642199755.

The product of its digits is 97200, while the sum is 42.

The spelling of 21192591453 in words is "twenty-one billion, one hundred ninety-two million, five hundred ninety-one thousand, four hundred fifty-three".