21452152143 has 32 divisors (see below), whose sum is σ = 30036529152. Its totient is φ = 13604371200.

The previous prime is 21452152133. The next prime is 21452152177. The reversal of 21452152143 is 34125125412.

It is not a de Polignac number, because 21452152143 - 2¹⁴ = 21452135759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21452152143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452152123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1559805 + ... + 1573497.

It is an arithmetic number, because the mean of its divisors is an integer number (938641536).

Almost surely, 2^21452152143 is an apocalyptic number.

21452152143 is a deficient number, since it is larger than the sum of its proper divisors (8584377009).

21452152143 is a wasteful number, since it uses less digits than its factorization.

21452152143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055.

The product of its digits is 9600, while the sum is 30.

Adding to 21452152143 its reverse (34125125412), we get a palindrome (55577277555).

The spelling of 21452152143 in words is "twenty-one billion, four hundred fifty-two million, one hundred fifty-two thousand, one hundred forty-three".