21442002023 has 16 divisors (see below), whose sum is σ = 23610787200. Its totient is φ = 19348421376.

The previous prime is 21442002007. The next prime is 21442002041. The reversal of 21442002023 is 32020024412.

It is a cyclic number.

It is not a de Polignac number, because 21442002023 - 2⁴ = 21442002007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21442001986 and 21442002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442005023) 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, 503153 + ... + 544101.

It is an arithmetic number, because the mean of its divisors is an integer number (1475674200).

Almost surely, 2^21442002023 is an apocalyptic number.

21442002023 is a deficient number, since it is larger than the sum of its proper divisors (2168785177).

21442002023 is a wasteful number, since it uses less digits than its factorization.

21442002023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41866.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21442002023 its reverse (32020024412), we get a palindrome (53462026435).

The spelling of 21442002023 in words is "twenty-one billion, four hundred forty-two million, two thousand, twenty-three".