19939374 has 144 divisors (see below), whose sum is σ = 56766528. Its totient is φ = 5007744.

The previous prime is 19939369. The next prime is 19939393. The reversal of 19939374 is 47393991.

19939374 is a `hidden beast` number, since 199 + 393 + 74 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 424219 + ... + 424265.

It is an arithmetic number, because the mean of its divisors is an integer number (394212).

Almost surely, 2^19939374 is an apocalyptic number.

19939374 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19939374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28383264).

19939374 is an abundant number, since it is smaller than the sum of its proper divisors (36827154).

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

19939374 is a wasteful number, since it uses less digits than its factorization.

19939374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 109 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 19939374 is about 4465.3526176552. The cubic root of 19939374 is about 271.1672102524.

The spelling of 19939374 in words is "nineteen million, nine hundred thirty-nine thousand, three hundred seventy-four".