19842939594 has 12 divisors (see below), whose sum is σ = 42993035826. Its totient is φ = 6614313192.

The previous prime is 19842939581. The next prime is 19842939607. The reversal of 19842939594 is 49593924891.

19842939594 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 2 + 9 + 39 + 594 = 666.

It is an interprime number because it is at equal distance from previous prime (19842939581) and next prime (19842939607).

It can be written as a sum of positive squares in only one way, i.e., 19234083969 + 608855625 = 138687^2 + 24675^2 .

It is a super-2 number, since 2×19842939594² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 551192749 + ... + 551192784.

Almost surely, 2^19842939594 is an apocalyptic number.

19842939594 is an abundant number, since it is smaller than the sum of its proper divisors (23150096232).

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

19842939594 is a wasteful number, since it uses less digits than its factorization.

19842939594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102385541 (or 1102385538 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 19842939594 in words is "nineteen billion, eight hundred forty-two million, nine hundred thirty-nine thousand, five hundred ninety-four".