21374647143 has 4 divisors (see below), whose sum is σ = 28499529528. Its totient is φ = 14249764760.

The previous prime is 21374647141. The next prime is 21374647181. The reversal of 21374647143 is 34174647312.

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 21374647143 - 2¹ = 21374647141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21374647095 and 21374647104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374647141) 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, 3562441188 + ... + 3562441193.

It is an arithmetic number, because the mean of its divisors is an integer number (7124882382).

Almost surely, 2^21374647143 is an apocalyptic number.

21374647143 is a deficient number, since it is larger than the sum of its proper divisors (7124882385).

21374647143 is an equidigital number, since it uses as much as digits as its factorization.

21374647143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124882384.

The product of its digits is 338688, while the sum is 42.

The spelling of 21374647143 in words is "twenty-one billion, three hundred seventy-four million, six hundred forty-seven thousand, one hundred forty-three".