21325340005 has 16 divisors (see below), whose sum is σ = 27302577984. Its totient is φ = 15934147840.

The previous prime is 21325339949. The next prime is 21325340021. The reversal of 21325340005 is 50004352312.

It is not a de Polignac number, because 21325340005 - 2³³ = 12735405413 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 15 ways as a sum of consecutive naturals, for example, 946447 + ... + 968716.

It is an arithmetic number, because the mean of its divisors is an integer number (1706411124).

Almost surely, 2^21325340005 is an apocalyptic number.

It is an amenable number.

21325340005 is a deficient number, since it is larger than the sum of its proper divisors (5977237979).

21325340005 is a wasteful number, since it uses less digits than its factorization.

21325340005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915316.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 21325340005 its reverse (50004352312), we get a palindrome (71329692317).

The spelling of 21325340005 in words is "twenty-one billion, three hundred twenty-five million, three hundred forty thousand, five".