21143214953 has 8 divisors (see below), whose sum is σ = 25435446720. Its totient is φ = 17168926320.

The previous prime is 21143214947. The next prime is 21143214971. The reversal of 21143214953 is 35941234112.

It is a happy number.

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

It is not a de Polignac number, because 21143214953 - 2¹² = 21143210857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21143214943) 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, 79485638 + ... + 79485903.

It is an arithmetic number, because the mean of its divisors is an integer number (3179430840).

Almost surely, 2^21143214953 is an apocalyptic number.

It is an amenable number.

21143214953 is a deficient number, since it is larger than the sum of its proper divisors (4292231767).

21143214953 is a wasteful number, since it uses less digits than its factorization.

21143214953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158971567.

The product of its digits is 25920, while the sum is 35.

The spelling of 21143214953 in words is "twenty-one billion, one hundred forty-three million, two hundred fourteen thousand, nine hundred fifty-three".