19113890 has 16 divisors (see below), whose sum is σ = 34655040. Its totient is φ = 7590000.

The previous prime is 19113883. The next prime is 19113893. The reversal of 19113890 is 9831191.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (19113893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5486 + ... + 8265.

It is an arithmetic number, because the mean of its divisors is an integer number (2165940).

Almost surely, 2^19113890 is an apocalyptic number.

19113890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19113890 is a deficient number, since it is larger than the sum of its proper divisors (15541150).

19113890 is a wasteful number, since it uses less digits than its factorization.

19113890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13897.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 19113890 is about 4371.9435037521. The cubic root of 19113890 is about 267.3722684789.

The spelling of 19113890 in words is "nineteen million, one hundred thirteen thousand, eight hundred ninety".