19997456294 has 16 divisors (see below), whose sum is σ = 30491354880. Its totient is φ = 9834344520.

The previous prime is 19997456293. The next prime is 19997456327. The reversal of 19997456294 is 49265479991.

It is a self number, because there is not a number n which added to its sum of digits gives 19997456294.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997456293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108554 + ... + 227549.

It is an arithmetic number, because the mean of its divisors is an integer number (1905709680).

Almost surely, 2^19997456294 is an apocalyptic number.

19997456294 is a deficient number, since it is larger than the sum of its proper divisors (10493898586).

19997456294 is a wasteful number, since it uses less digits than its factorization.

19997456294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336595.

The product of its digits is 44089920, while the sum is 65.

The spelling of 19997456294 in words is "nineteen billion, nine hundred ninety-seven million, four hundred fifty-six thousand, two hundred ninety-four".