21303210323005 has 16 divisors (see below), whose sum is σ = 28049742246960. Its totient is φ = 15434778797568.

The previous prime is 21303210322981. The next prime is 21303210323027. The reversal of 21303210323005 is 50032301230312.

It can be written as a sum of positive squares in 8 ways, for example, as 1366217335609 + 19936992987396 = 1168853^2 + 4465086^2 .

It is not a de Polignac number, because 21303210323005 - 2²³ = 21303201934397 is a prime.

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, 3091899360 + ... + 3091906249.

It is an arithmetic number, because the mean of its divisors is an integer number (1753108890435).

Almost surely, 2^{21303210323005} is an apocalyptic number.

It is an amenable number.

21303210323005 is a deficient number, since it is larger than the sum of its proper divisors (6746531923955).

21303210323005 is a wasteful number, since it uses less digits than its factorization.

21303210323005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183805680.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21303210323005 its reverse (50032301230312), we get a palindrome (71335511553317).

The spelling of 21303210323005 in words is "twenty-one trillion, three hundred three billion, two hundred ten million, three hundred twenty-three thousand, five".