19969343954 has 16 divisors (see below), whose sum is σ = 34536112128. Its totient is φ = 8482552512.

The previous prime is 19969343951. The next prime is 19969344013. The reversal of 19969343954 is 45934396991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19969343951) 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, 6309842 + ... + 6313005.

It is an arithmetic number, because the mean of its divisors is an integer number (2158507008).

Almost surely, 2^19969343954 is an apocalyptic number.

19969343954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19969343954 is a deficient number, since it is larger than the sum of its proper divisors (14566768174).

19969343954 is a wasteful number, since it uses less digits than its factorization.

19969343954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12622969.

The product of its digits is 28343520, while the sum is 62.

The spelling of 19969343954 in words is "nineteen billion, nine hundred sixty-nine million, three hundred forty-three thousand, nine hundred fifty-four".