21553292005 has 8 divisors (see below), whose sum is σ = 29558800512. Its totient is φ = 14779400208.

The previous prime is 21553291979. The next prime is 21553292017. The reversal of 21553292005 is 50029235512.

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 21553292005 - 2¹¹ = 21553289957 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, 307904137 + ... + 307904206.

It is an arithmetic number, because the mean of its divisors is an integer number (3694850064).

Almost surely, 2^21553292005 is an apocalyptic number.

It is an amenable number.

21553292005 is a deficient number, since it is larger than the sum of its proper divisors (8005508507).

21553292005 is an equidigital number, since it uses as much as digits as its factorization.

21553292005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615808355.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 21553292005 in words is "twenty-one billion, five hundred fifty-three million, two hundred ninety-two thousand, five".