19420031806 has 16 divisors (see below), whose sum is σ = 33382204416. Its totient is φ = 8300190456.

The previous prime is 19420031713. The next prime is 19420031831. The reversal of 19420031806 is 60813002491.

It is a congruent number.

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, 1884706 + ... + 1894981.

It is an arithmetic number, because the mean of its divisors is an integer number (2086387776).

Almost surely, 2^19420031806 is an apocalyptic number.

19420031806 is a deficient number, since it is larger than the sum of its proper divisors (13962172610).

19420031806 is a wasteful number, since it uses less digits than its factorization.

19420031806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780063.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 19420031806 in words is "nineteen billion, four hundred twenty million, thirty-one thousand, eight hundred six".