21430023133 has 16 divisors (see below), whose sum is σ = 22543589376. Its totient is φ = 20350335600.

The previous prime is 21430023113. The next prime is 21430023137. The reversal of 21430023133 is 33132003412.

It is a cyclic number.

It is not a de Polignac number, because 21430023133 - 2²⁵ = 21396468701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430023137) 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, 270060 + ... + 340282.

It is an arithmetic number, because the mean of its divisors is an integer number (1408974336).

Almost surely, 2^21430023133 is an apocalyptic number.

It is an amenable number.

21430023133 is a deficient number, since it is larger than the sum of its proper divisors (1113566243).

21430023133 is a wasteful number, since it uses less digits than its factorization.

21430023133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70464.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21430023133 its reverse (33132003412), we get a palindrome (54562026545).

The spelling of 21430023133 in words is "twenty-one billion, four hundred thirty million, twenty-three thousand, one hundred thirty-three".