19700742997 has 8 divisors (see below), whose sum is σ = 21311327744. Its totient is φ = 18103750128.

The previous prime is 19700742983. The next prime is 19700743001. The reversal of 19700742997 is 79924700791.

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

It is a de Polignac number, because none of the positive numbers 2^k-19700742997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19700442997) 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 7 ways as a sum of consecutive naturals, for example, 3394953 + ... + 3400750.

It is an arithmetic number, because the mean of its divisors is an integer number (2663915968).

Almost surely, 2^19700742997 is an apocalyptic number.

19700742997 is the 81037-th hex number.

It is an amenable number.

19700742997 is a deficient number, since it is larger than the sum of its proper divisors (1610584747).

19700742997 is a wasteful number, since it uses less digits than its factorization.

19700742997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795939.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The spelling of 19700742997 in words is "nineteen billion, seven hundred million, seven hundred forty-two thousand, nine hundred ninety-seven".