19494314421 has 16 divisors (see below), whose sum is σ = 26133542400. Its totient is φ = 12925701360.

The previous prime is 19494314417. The next prime is 19494314461. The reversal of 19494314421 is 12441349491.

It is not a de Polignac number, because 19494314421 - 2² = 19494314417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19494314461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1983706 + ... + 1993508.

It is an arithmetic number, because the mean of its divisors is an integer number (1633346400).

Almost surely, 2^19494314421 is an apocalyptic number.

It is an amenable number.

19494314421 is a deficient number, since it is larger than the sum of its proper divisors (6639227979).

19494314421 is a wasteful number, since it uses less digits than its factorization.

19494314421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13336.

The product of its digits is 124416, while the sum is 42.

The spelling of 19494314421 in words is "nineteen billion, four hundred ninety-four million, three hundred fourteen thousand, four hundred twenty-one".