21364525454005 has 8 divisors (see below), whose sum is σ = 26330334073272. Its totient is φ = 16629684677568.

The previous prime is 21364525453993. The next prime is 21364525454023. The reversal of 21364525454005 is 50045452546312.

It can be written as a sum of positive squares in 4 ways, for example, as 9001974108241 + 12362551345764 = 3000329^2 + 3516042^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21364525454005 - 2²⁷ = 21364391236277 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 7 ways as a sum of consecutive naturals, for example, 57741960502 + ... + 57741960871.

It is an arithmetic number, because the mean of its divisors is an integer number (3291291759159).

Almost surely, 2^{21364525454005} is an apocalyptic number.

It is an amenable number.

21364525454005 is a deficient number, since it is larger than the sum of its proper divisors (4965808619267).

21364525454005 is a wasteful number, since it uses less digits than its factorization.

21364525454005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115483921415.

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 21364525454005 in words is "twenty-one trillion, three hundred sixty-four billion, five hundred twenty-five million, four hundred fifty-four thousand, five".