21130032003023 has 4 divisors (see below), whose sum is σ = 21220718835888. Its totient is φ = 21039345170160.

The previous prime is 21130032003019. The next prime is 21130032003029. The reversal of 21130032003023 is 32030023003112.

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 21130032003023 - 2² = 21130032003019 is a prime.

It is a super-2 number, since 2×21130032003023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130032002986 and 21130032003004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130032003029) 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, 45343416083 + ... + 45343416548.

It is an arithmetic number, because the mean of its divisors is an integer number (5305179708972).

Almost surely, 2^{21130032003023} is an apocalyptic number.

21130032003023 is a deficient number, since it is larger than the sum of its proper divisors (90686832865).

21130032003023 is an equidigital number, since it uses as much as digits as its factorization.

21130032003023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90686832864.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21130032003023 its reverse (32030023003112), we get a palindrome (53160055006135).

The spelling of 21130032003023 in words is "twenty-one trillion, one hundred thirty billion, thirty-two million, three thousand, twenty-three".