21313132023 has 16 divisors (see below), whose sum is σ = 29405553120. Its totient is φ = 13715003904.

The previous prime is 21313132007. The next prime is 21313132031. The reversal of 21313132023 is 32023131312.

It is not a de Polignac number, because 21313132023 - 2⁴ = 21313132007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313132073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301515 + ... + 365427.

It is an arithmetic number, because the mean of its divisors is an integer number (1837847070).

Almost surely, 2^21313132023 is an apocalyptic number.

21313132023 is a deficient number, since it is larger than the sum of its proper divisors (8092421097).

21313132023 is a wasteful number, since it uses less digits than its factorization.

21313132023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67778.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21313132023 its reverse (32023131312), we get a palindrome (53336263335).

The spelling of 21313132023 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty-two thousand, twenty-three".