21134045023 has 16 divisors (see below), whose sum is σ = 27541200960. Its totient is φ = 15737826816.

The previous prime is 21134044979. The next prime is 21134045039. The reversal of 21134045023 is 32054043112.

It is a cyclic number.

It is not a de Polignac number, because 21134045023 - 2²⁵ = 21100490591 is a prime.

It is a super-3 number, since 3×21134045023³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134045323) 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, 6829108 + ... + 6832201.

It is an arithmetic number, because the mean of its divisors is an integer number (1721325060).

Almost surely, 2^21134045023 is an apocalyptic number.

21134045023 is a deficient number, since it is larger than the sum of its proper divisors (6407155937).

21134045023 is a wasteful number, since it uses less digits than its factorization.

21134045023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13661346.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21134045023 its reverse (32054043112), we get a palindrome (53188088135).

The spelling of 21134045023 in words is "twenty-one billion, one hundred thirty-four million, forty-five thousand, twenty-three".