19138994 has 32 divisors (see below), whose sum is σ = 33914496. Its totient is φ = 7931520.

The previous prime is 19138993. The next prime is 19139009. The reversal of 19138994 is 49983191.

It is not an unprimeable number, because it can be changed into a prime (19138993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62189 + ... + 62495.

It is an arithmetic number, because the mean of its divisors is an integer number (1059828).

Almost surely, 2^19138994 is an apocalyptic number.

19138994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19138994 is a deficient number, since it is larger than the sum of its proper divisors (14775502).

19138994 is a wasteful number, since it uses less digits than its factorization.

19138994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its digits is 69984, while the sum is 44.

The square root of 19138994 is about 4374.8135960290. The cubic root of 19138994 is about 267.4892719953.

The spelling of 19138994 in words is "nineteen million, one hundred thirty-eight thousand, nine hundred ninety-four".