19192990 has 8 divisors (see below), whose sum is σ = 34547400. Its totient is φ = 7677192.

The previous prime is 19192931. The next prime is 19192991. The reversal of 19192990 is 9929191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19192991) 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, 959640 + ... + 959659.

It is an arithmetic number, because the mean of its divisors is an integer number (4318425).

Almost surely, 2^19192990 is an apocalyptic number.

19192990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19192990 is a deficient number, since it is larger than the sum of its proper divisors (15354410).

19192990 is a wasteful number, since it uses less digits than its factorization.

19192990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919306.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 19192990 is about 4380.9804838643. The cubic root of 19192990 is about 267.7405876981.

The spelling of 19192990 in words is "nineteen million, one hundred ninety-two thousand, nine hundred ninety".