19492490 has 32 divisors (see below), whose sum is σ = 36509184. Its totient is φ = 7485120.

The previous prime is 19492483. The next prime is 19492541. The reversal of 19492490 is 9429491.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70232 + ... + 70508.

It is an arithmetic number, because the mean of its divisors is an integer number (1140912).

Almost surely, 2^19492490 is an apocalyptic number.

19492490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19492490 is a deficient number, since it is larger than the sum of its proper divisors (17016694).

19492490 is a wasteful number, since it uses less digits than its factorization.

19492490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 19492490 is about 4415.0300112230. The cubic root of 19492490 is about 269.1260723840.

The spelling of 19492490 in words is "nineteen million, four hundred ninety-two thousand, four hundred ninety".