19696267216490 has 16 divisors (see below), whose sum is σ = 36122210820648. Its totient is φ = 7729855813056.

The previous prime is 19696267216441. The next prime is 19696267216499. The reversal of 19696267216490 is 9461276269691.

It can be written as a sum of positive squares in 4 ways, for example, as 14518835708881 + 5177431507609 = 3810359^2 + 2275397^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19696267216490.

It is not an unprimeable number, because it can be changed into a prime (19696267216499) 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, 18581383637 + ... + 18581384696.

Almost surely, 2^{19696267216490} is an apocalyptic number.

19696267216490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19696267216490 is a deficient number, since it is larger than the sum of its proper divisors (16425943604158).

19696267216490 is a wasteful number, since it uses less digits than its factorization.

19696267216490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37162768393.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 19696267216490 in words is "nineteen trillion, six hundred ninety-six billion, two hundred sixty-seven million, two hundred sixteen thousand, four hundred ninety".