21452500205245 has 32 divisors (see below), whose sum is σ = 25827803099136. Its totient is φ = 17105594126400.

The previous prime is 21452500205237. The next prime is 21452500205251. The reversal of 21452500205245 is 54250200525412.

It is not a de Polignac number, because 21452500205245 - 2³ = 21452500205237 is a prime.

It is a Duffinian number.

It is a congruent 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, 5070312280 + ... + 5070316510.

It is an arithmetic number, because the mean of its divisors is an integer number (807118846848).

Almost surely, 2^{21452500205245} is an apocalyptic number.

It is an amenable number.

21452500205245 is a deficient number, since it is larger than the sum of its proper divisors (4375302893891).

21452500205245 is a wasteful number, since it uses less digits than its factorization.

21452500205245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 21452500205245 in words is "twenty-one trillion, four hundred fifty-two billion, five hundred million, two hundred five thousand, two hundred forty-five".