21041552005 has 8 divisors (see below), whose sum is σ = 25626726432. Its totient is φ = 16581998928.

The previous prime is 21041552003. The next prime is 21041552041. The reversal of 21041552005 is 50025514012.

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 21041552005 - 2¹ = 21041552003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041552003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31404967 + ... + 31405636.

It is an arithmetic number, because the mean of its divisors is an integer number (3203340804).

Almost surely, 2^21041552005 is an apocalyptic number.

It is an amenable number.

21041552005 is a deficient number, since it is larger than the sum of its proper divisors (4585174427).

21041552005 is an equidigital number, since it uses as much as digits as its factorization.

21041552005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62810675.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 21041552005 in words is "twenty-one billion, forty-one million, five hundred fifty-two thousand, five".