19700640626 has 8 divisors (see below), whose sum is σ = 29551854720. Its totient is φ = 9850022388.

The previous prime is 19700640613. The next prime is 19700640629. The reversal of 19700640626 is 62604600791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (19700640629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54266 + ... + 205781.

It is an arithmetic number, because the mean of its divisors is an integer number (3693981840).

Almost surely, 2^19700640626 is an apocalyptic number.

19700640626 is a deficient number, since it is larger than the sum of its proper divisors (9851214094).

19700640626 is a wasteful number, since it uses less digits than its factorization.

19700640626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297928.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 19700640626 in words is "nineteen billion, seven hundred million, six hundred forty thousand, six hundred twenty-six".