19161490 has 16 divisors (see below), whose sum is σ = 34587648. Its totient is φ = 7643056.

The previous prime is 19161479. The next prime is 19161491. The reversal of 19161490 is 9416191.

It is not an unprimeable number, because it can be changed into a prime (19161491) 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, 1329 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (2161728).

Almost surely, 2^19161490 is an apocalyptic number.

19161490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19161490 is a deficient number, since it is larger than the sum of its proper divisors (15426158).

19161490 is a wasteful number, since it uses less digits than its factorization.

19161490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 19161490 is about 4377.3839219333. The cubic root of 19161490 is about 267.5940333805.

The spelling of 19161490 in words is "nineteen million, one hundred sixty-one thousand, four hundred ninety".