19211095490 has 16 divisors (see below), whose sum is σ = 34616893752. Its totient is φ = 7676233344.

The previous prime is 19211095487. The next prime is 19211095513. The reversal of 19211095490 is 9459011291.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14161714009 + 5049381481 = 119003^2 + 71059^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015769 + ... + 1034508.

Almost surely, 2^19211095490 is an apocalyptic number.

19211095490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19211095490 is a deficient number, since it is larger than the sum of its proper divisors (15405798262).

19211095490 is a wasteful number, since it uses less digits than its factorization.

19211095490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051221.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 19211095490 in words is "nineteen billion, two hundred eleven million, ninety-five thousand, four hundred ninety".