19492190 has 16 divisors (see below), whose sum is σ = 35415792. Its totient is φ = 7723584.

The previous prime is 19492163. The next prime is 19492199. The reversal of 19492190 is 9129491.

It is a super-2 number, since 2×19492190² = 759890941992200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19492190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19492199) 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, 8039 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (2213487).

Almost surely, 2^19492190 is an apocalyptic number.

19492190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19492190 is a deficient number, since it is larger than the sum of its proper divisors (15923602).

19492190 is a wasteful number, since it uses less digits than its factorization.

19492190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18331.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 19492190 is about 4414.9960362383. The cubic root of 19492190 is about 269.1246917115.

Adding to 19492190 its sum of digits (35), we get a square (19492225 = 4415²).

The spelling of 19492190 in words is "nineteen million, four hundred ninety-two thousand, one hundred ninety".