11971423396 has 27 divisors (see below), whose sum is σ = 21130364577. Its totient is φ = 5934615360.

The previous prime is 11971423391. The next prime is 11971423421. The reversal of 11971423396 is 69332417911.

The square root of 11971423396 is 109414.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9003352996 + 2968070400 = 94886^2 + 54480^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11971423391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 49673836 + ... + 49674076.

Almost surely, 2^11971423396 is an apocalyptic number.

11971423396 is the 109414-th square number.

It is an amenable number.

11971423396 is a deficient number, since it is larger than the sum of its proper divisors (9158941181).

11971423396 is an frugal number, since it uses more digits than its factorization.

11971423396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 470 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The spelling of 11971423396 in words is "eleven billion, nine hundred seventy-one million, four hundred twenty-three thousand, three hundred ninety-six".