21023233023 has 8 divisors (see below), whose sum is σ = 30187206448. Its totient is φ = 12937374144.

The previous prime is 21023232977. The next prime is 21023233027. The reversal of 21023233023 is 32033232012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21023233023 - 2⁹ = 21023232511 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 (21023233027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269528590 + ... + 269528667.

It is an arithmetic number, because the mean of its divisors is an integer number (3773400806).

Almost surely, 2^21023233023 is an apocalyptic number.

21023233023 is a deficient number, since it is larger than the sum of its proper divisors (9163973425).

21023233023 is a wasteful number, since it uses less digits than its factorization.

21023233023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539057273.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21023233023 its reverse (32033232012), we get a palindrome (53056465035).

The spelling of 21023233023 in words is "twenty-one billion, twenty-three million, two hundred thirty-three thousand, twenty-three".