21742471334 has 16 divisors (see below), whose sum is σ = 34548962400. Its totient is φ = 10226772864.

The previous prime is 21742471321. The next prime is 21742471409. The reversal of 21742471334 is 43317424712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84194 + ... + 224885.

It is an arithmetic number, because the mean of its divisors is an integer number (2159310150).

Almost surely, 2^21742471334 is an apocalyptic number.

21742471334 is a deficient number, since it is larger than the sum of its proper divisors (12806491066).

21742471334 is a wasteful number, since it uses less digits than its factorization.

21742471334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311167.

The product of its digits is 112896, while the sum is 38.

The spelling of 21742471334 in words is "twenty-one billion, seven hundred forty-two million, four hundred seventy-one thousand, three hundred thirty-four".