19139274 has 64 divisors (see below), whose sum is σ = 53038080. Its totient is φ = 4970160.

The previous prime is 19139273. The next prime is 19139291. The reversal of 19139274 is 47293191.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19139273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1857 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (828720).

Almost surely, 2^19139274 is an apocalyptic number.

19139274 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 19139274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26519040).

19139274 is an abundant number, since it is smaller than the sum of its proper divisors (33898806).

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

19139274 is a wasteful number, since it uses less digits than its factorization.

19139274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632 (or 4626 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 19139274 is about 4374.8455972754. The cubic root of 19139274 is about 267.4905764287.

The spelling of 19139274 in words is "nineteen million, one hundred thirty-nine thousand, two hundred seventy-four".