19996194402 has 12 divisors (see below), whose sum is σ = 43325087910. Its totient is φ = 6665398128.

The previous prime is 19996194373. The next prime is 19996194409. The reversal of 19996194402 is 20449169991.

19996194402 is a `hidden beast` number, since 1 + 9 + 99 + 61 + 94 + 402 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19946195361 + 49999041 = 141231^2 + 7071^2 .

It is a super-2 number, since 2×19996194402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19996194409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555449827 + ... + 555449862.

Almost surely, 2^19996194402 is an apocalyptic number.

19996194402 is an abundant number, since it is smaller than the sum of its proper divisors (23328893508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19996194402 is a wasteful number, since it uses less digits than its factorization.

19996194402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110899697 (or 1110899694 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 19996194402 in words is "nineteen billion, nine hundred ninety-six million, one hundred ninety-four thousand, four hundred two".