11922371986 has 20 divisors (see below), whose sum is σ = 20862917982. Its totient is φ = 5109585936.

The previous prime is 11922371957. The next prime is 11922372029. The reversal of 11922371986 is 68917322911.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6656112225 + 5266259761 = 81585^2 + 72569^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1236595 + ... + 1246198.

Almost surely, 2^11922371986 is an apocalyptic number.

11922371986 is a deficient number, since it is larger than the sum of its proper divisors (8940545996).

11922371986 is an frugal number, since it uses more digits than its factorization.

11922371986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482823 (or 2482802 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The spelling of 11922371986 in words is "eleven billion, nine hundred twenty-two million, three hundred seventy-one thousand, nine hundred eighty-six".