19955290 has 8 divisors (see below), whose sum is σ = 35919540. Its totient is φ = 7982112.

The previous prime is 19955269. The next prime is 19955291. The reversal of 19955290 is 9255991.

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 762129 = 4381^2 + 873^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (19955291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997755 + ... + 997774.

Almost surely, 2^19955290 is an apocalyptic number.

19955290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19955290 is a deficient number, since it is larger than the sum of its proper divisors (15964250).

19955290 is a wasteful number, since it uses less digits than its factorization.

19955290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995536.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 19955290 is about 4467.1344282437. The cubic root of 19955290 is about 271.2393413949.

The spelling of 19955290 in words is "nineteen million, nine hundred fifty-five thousand, two hundred ninety".