19939794 has 16 divisors (see below), whose sum is σ = 45576768. Its totient is φ = 5697072.

The previous prime is 19939783. The next prime is 19939811. The reversal of 19939794 is 49793991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237337 + ... + 237420.

It is an arithmetic number, because the mean of its divisors is an integer number (2848548).

Almost surely, 2^19939794 is an apocalyptic number.

19939794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19939794 is an abundant number, since it is smaller than the sum of its proper divisors (25636974).

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

19939794 is a wasteful number, since it uses less digits than its factorization.

19939794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474769.

The product of its digits is 551124, while the sum is 51.

The square root of 19939794 is about 4465.3996461683. The cubic root of 19939794 is about 271.1691141809.

It can be divided in two parts, 199 and 39794, that added together give a palindrome (39993).

The spelling of 19939794 in words is "nineteen million, nine hundred thirty-nine thousand, seven hundred ninety-four".