21734784426 has 8 divisors (see below), whose sum is σ = 43469568864. Its totient is φ = 7244928140.

The previous prime is 21734784403. The next prime is 21734784439. The reversal of 21734784426 is 62448743712.

It is a sphenic number, since it is the product of 3 distinct primes.

21734784426 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811232030 + ... + 1811232041.

It is an arithmetic number, because the mean of its divisors is an integer number (5433696108).

Almost surely, 2^21734784426 is an apocalyptic number.

21734784426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21734784426 is a wasteful number, since it uses less digits than its factorization.

21734784426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622464076.

The product of its digits is 1806336, while the sum is 48.

The spelling of 21734784426 in words is "twenty-one billion, seven hundred thirty-four million, seven hundred eighty-four thousand, four hundred twenty-six".