21463787543 has 4 divisors (see below), whose sum is σ = 23415040968. Its totient is φ = 19512534120.

The previous prime is 21463787503. The next prime is 21463787549. The reversal of 21463787543 is 34578736412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21463787543 - 2¹⁴ = 21463771159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21463787491 and 21463787500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463787549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975626696 + ... + 975626717.

It is an arithmetic number, because the mean of its divisors is an integer number (5853760242).

Almost surely, 2^21463787543 is an apocalyptic number.

21463787543 is a deficient number, since it is larger than the sum of its proper divisors (1951253425).

21463787543 is a wasteful number, since it uses less digits than its factorization.

21463787543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951253424.

The product of its digits is 3386880, while the sum is 50.

The spelling of 21463787543 in words is "twenty-one billion, four hundred sixty-three million, seven hundred eighty-seven thousand, five hundred forty-three".