21132300023 has 4 divisors (see below), whose sum is σ = 22244526360. Its totient is φ = 20020073688.

The previous prime is 21132299963. The next prime is 21132300031. The reversal of 21132300023 is 32000323112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21132300023 - 2⁶ = 21132299959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21132299974 and 21132300010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132300053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556113140 + ... + 556113177.

It is an arithmetic number, because the mean of its divisors is an integer number (5561131590).

Almost surely, 2^21132300023 is an apocalyptic number.

21132300023 is a deficient number, since it is larger than the sum of its proper divisors (1112226337).

21132300023 is a wasteful number, since it uses less digits than its factorization.

21132300023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112226336.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21132300023 its reverse (32000323112), we get a palindrome (53132623135).

The spelling of 21132300023 in words is "twenty-one billion, one hundred thirty-two million, three hundred thousand, twenty-three".