19621620606 has 64 divisors (see below), whose sum is σ = 47237253120. Its totient is φ = 5308040160.

The previous prime is 19621620533. The next prime is 19621620607. The reversal of 19621620606 is 60602612691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621620607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1598665 + ... + 1610891.

It is an arithmetic number, because the mean of its divisors is an integer number (738082080).

Almost surely, 2^19621620606 is an apocalyptic number.

19621620606 is an abundant number, since it is smaller than the sum of its proper divisors (27615632514).

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

19621620606 is a wasteful number, since it uses less digits than its factorization.

19621620606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 19621620606 in words is "nineteen billion, six hundred twenty-one million, six hundred twenty thousand, six hundred six".