19816236006 has 32 divisors (see below), whose sum is σ = 45301213440. Its totient is φ = 5660911776.

The previous prime is 19816235983. The next prime is 19816236019. The reversal of 19816236006 is 60063261891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 270985 + ... + 336251.

It is an arithmetic number, because the mean of its divisors is an integer number (1415662920).

Almost surely, 2^19816236006 is an apocalyptic number.

19816236006 is an abundant number, since it is smaller than the sum of its proper divisors (25484977434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19816236006 is a wasteful number, since it uses less digits than its factorization.

19816236006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72508.

The product of its (nonzero) digits is 93312, while the sum is 42.

Adding to 19816236006 its reverse (60063261891), we get a palindrome (79879497897).

The spelling of 19816236006 in words is "nineteen billion, eight hundred sixteen million, two hundred thirty-six thousand, six".