19489450 has 24 divisors (see below), whose sum is σ = 37503180. Its totient is φ = 7526400.

The previous prime is 19489447. The next prime is 19489451. The reversal of 19489450 is 5498491.

It can be written as a sum of positive squares in 6 ways, for example, as 3736489 + 15752961 = 1933^2 + 3969^2 .

It is a super-2 number, since 2×19489450² = 759677322605000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19489451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5271 + ... + 8170.

Almost surely, 2^19489450 is an apocalyptic number.

19489450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19489450 is a deficient number, since it is larger than the sum of its proper divisors (18013730).

19489450 is a wasteful number, since it uses less digits than its factorization.

19489450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13482 (or 13477 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 19489450 is about 4414.6857192783. The cubic root of 19489450 is about 269.1120809135.

The spelling of 19489450 in words is "nineteen million, four hundred eighty-nine thousand, four hundred fifty".