19894014221 has 8 divisors (see below), whose sum is σ = 20021625120. Its totient is φ = 19766471472.

The previous prime is 19894014149. The next prime is 19894014223. The reversal of 19894014221 is 12241049891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19894014221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894014223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652250 + ... + 682068.

It is an arithmetic number, because the mean of its divisors is an integer number (2502703140).

Almost surely, 2^19894014221 is an apocalyptic number.

It is an amenable number.

19894014221 is a deficient number, since it is larger than the sum of its proper divisors (127610899).

19894014221 is a wasteful number, since it uses less digits than its factorization.

19894014221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34075.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 19894014221 in words is "nineteen billion, eight hundred ninety-four million, fourteen thousand, two hundred twenty-one".