21153022005 has 32 divisors (see below), whose sum is σ = 34201203840. Its totient is φ = 11163156480.

The previous prime is 21153021991. The next prime is 21153022057. The reversal of 21153022005 is 50022035112.

It is not a de Polignac number, because 21153022005 - 2⁵ = 21153021973 is a prime.

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, 1039125 + ... + 1059285.

It is an arithmetic number, because the mean of its divisors is an integer number (1068787620).

Almost surely, 2^21153022005 is an apocalyptic number.

It is an amenable number.

21153022005 is a deficient number, since it is larger than the sum of its proper divisors (13048181835).

21153022005 is a wasteful number, since it uses less digits than its factorization.

21153022005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20901.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21153022005 its reverse (50022035112), we get a palindrome (71175057117).

The spelling of 21153022005 in words is "twenty-one billion, one hundred fifty-three million, twenty-two thousand, five".