19659297964 has 12 divisors (see below), whose sum is σ = 36427522824. Its totient is φ = 9251434304.

The previous prime is 19659297961. The next prime is 19659297971. The reversal of 19659297964 is 46979295691.

It is a self number, because there is not a number n which added to its sum of digits gives 19659297964.

It is not an unprimeable number, because it can be changed into a prime (19659297961) 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, 144553594 + ... + 144553729.

It is an arithmetic number, because the mean of its divisors is an integer number (3035626902).

Almost surely, 2^19659297964 is an apocalyptic number.

It is an amenable number.

19659297964 is a deficient number, since it is larger than the sum of its proper divisors (16768224860).

19659297964 is a wasteful number, since it uses less digits than its factorization.

19659297964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289107344 (or 289107342 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 67.

It can be divided in two parts, 1965 and 9297964, that added together give a palindrome (9299929).

The spelling of 19659297964 in words is "nineteen billion, six hundred fifty-nine million, two hundred ninety-seven thousand, nine hundred sixty-four".