21114444394 has 8 divisors (see below), whose sum is σ = 31711407588. Its totient is φ = 10543975200.

The previous prime is 21114444371. The next prime is 21114444443. The reversal of 21114444394 is 49344441112.

It can be written as a sum of positive squares in 2 ways, for example, as 19070229025 + 2044215369 = 138095^2 + 45213^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6621507 + ... + 6624694.

Almost surely, 2^21114444394 is an apocalyptic number.

21114444394 is a deficient number, since it is larger than the sum of its proper divisors (10596963194).

21114444394 is a wasteful number, since it uses less digits than its factorization.

21114444394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13247000.

The product of its digits is 55296, while the sum is 37.

The spelling of 21114444394 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-four thousand, three hundred ninety-four".