21130302234423 has 16 divisors (see below), whose sum is σ = 30193240329216. Its totient is φ = 13110222771360.

The previous prime is 21130302234359. The next prime is 21130302234479. The reversal of 21130302234423 is 32443220303112.

It is a happy number.

It is not a de Polignac number, because 21130302234423 - 2⁶ = 21130302234359 is a prime.

It is a super-2 number, since 2×21130302234423² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130302233423) 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, 4138325343 + ... + 4138330448.

It is an arithmetic number, because the mean of its divisors is an integer number (1887077520576).

Almost surely, 2^{21130302234423} is an apocalyptic number.

21130302234423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21130302234423 is a deficient number, since it is larger than the sum of its proper divisors (9062938094793).

21130302234423 is a wasteful number, since it uses less digits than its factorization.

21130302234423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8276655854.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21130302234423 its reverse (32443220303112), we get a palindrome (53573522537535).

The spelling of 21130302234423 in words is "twenty-one trillion, one hundred thirty billion, three hundred two million, two hundred thirty-four thousand, four hundred twenty-three".