19193242490 has 32 divisors (see below), whose sum is σ = 35414709840. Its totient is φ = 7487023104.

The previous prime is 19193242451. The next prime is 19193242501. The reversal of 19193242490 is 9424239191.

It can be written as a sum of positive squares in 8 ways, for example, as 9111275209 + 10081967281 = 95453^2 + 100409^2 .

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, 82739 + ... + 212678.

Almost surely, 2^19193242490 is an apocalyptic number.

19193242490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19193242490 is a deficient number, since it is larger than the sum of its proper divisors (16221467350).

19193242490 is a wasteful number, since it uses less digits than its factorization.

19193242490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295586.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 19193242490 in words is "nineteen billion, one hundred ninety-three million, two hundred forty-two thousand, four hundred ninety".