21933356394 has 8 divisors (see below), whose sum is σ = 43866712800. Its totient is φ = 7311118796.

The previous prime is 21933356383. The next prime is 21933356407. The reversal of 21933356394 is 49365333912.

It is a happy number.

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

21933356394 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, 1827779694 + ... + 1827779705.

It is an arithmetic number, because the mean of its divisors is an integer number (5483339100).

Almost surely, 2^21933356394 is an apocalyptic number.

21933356394 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.

21933356394 is a wasteful number, since it uses less digits than its factorization.

21933356394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655559404.

The product of its digits is 1574640, while the sum is 48.

The spelling of 21933356394 in words is "twenty-one billion, nine hundred thirty-three million, three hundred fifty-six thousand, three hundred ninety-four".