11993453451 has 24 divisors (see below), whose sum is σ = 20123292384. Its totient is φ = 6741048960.

The previous prime is 11993453443. The next prime is 11993453497. The reversal of 11993453451 is 15435439911.

11993453451 is a `hidden beast` number, since 1 + 199 + 3 + 4 + 5 + 3 + 451 = 666.

It is not a de Polignac number, because 11993453451 - 2³ = 11993453443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11993453397 and 11993453406.

It is not an unprimeable number, because it can be changed into a prime (11993453401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1556586 + ... + 1564271.

It is an arithmetic number, because the mean of its divisors is an integer number (838470516).

Almost surely, 2^11993453451 is an apocalyptic number.

11993453451 is a deficient number, since it is larger than the sum of its proper divisors (8129838933).

11993453451 is a wasteful number, since it uses less digits than its factorization.

11993453451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120931 (or 3120928 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 11993453451 in words is "eleven billion, nine hundred ninety-three million, four hundred fifty-three thousand, four hundred fifty-one".