21967426406 has 8 divisors (see below), whose sum is σ = 32970269064. Its totient is φ = 10977336720.

The previous prime is 21967426391. The next prime is 21967426417. The reversal of 21967426406 is 60462476912.

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

It is a congruent 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, 3183935 + ... + 3190826.

It is an arithmetic number, because the mean of its divisors is an integer number (4121283633).

Almost surely, 2^21967426406 is an apocalyptic number.

21967426406 is a deficient number, since it is larger than the sum of its proper divisors (11002842658).

21967426406 is a wasteful number, since it uses less digits than its factorization.

21967426406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376486.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 21967426406 in words is "twenty-one billion, nine hundred sixty-seven million, four hundred twenty-six thousand, four hundred six".