21500024342023 has 8 divisors (see below), whose sum is σ = 21867993059760. Its totient is φ = 21132555924480.

The previous prime is 21500024342009. The next prime is 21500024342047. The reversal of 21500024342023 is 32024342000512.

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

It is a cyclic number.

It is not a de Polignac number, because 21500024342023 - 2²⁵ = 21499990787591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21500024341982 and 21500024342000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21500024342123) 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, 124988365 + ... + 125160262.

It is an arithmetic number, because the mean of its divisors is an integer number (2733499132470).

Almost surely, 2^{21500024342023} is an apocalyptic number.

21500024342023 is a deficient number, since it is larger than the sum of its proper divisors (367968717737).

21500024342023 is a wasteful number, since it uses less digits than its factorization.

21500024342023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250150097.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21500024342023 its reverse (32024342000512), we get a palindrome (53524366342535).

The spelling of 21500024342023 in words is "twenty-one trillion, five hundred billion, twenty-four million, three hundred forty-two thousand, twenty-three".