21629864143 has 12 divisors (see below), whose sum is σ = 22567203984. Its totient is φ = 20728807200.

The previous prime is 21629864129. The next prime is 21629864147. The reversal of 21629864143 is 34146892612.

It is not a de Polignac number, because 21629864143 - 2⁵ = 21629864111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21629864093 and 21629864102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21629864147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10278 + ... + 208243.

It is an arithmetic number, because the mean of its divisors is an integer number (1880600332).

Almost surely, 2^21629864143 is an apocalyptic number.

21629864143 is a deficient number, since it is larger than the sum of its proper divisors (937339841).

21629864143 is a wasteful number, since it uses less digits than its factorization.

21629864143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218686 (or 218655 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The spelling of 21629864143 in words is "twenty-one billion, six hundred twenty-nine million, eight hundred sixty-four thousand, one hundred forty-three".