11993422451 has 2 divisors, whose sum is σ = 11993422452. Its totient is φ = 11993422450.

The previous prime is 11993422423. The next prime is 11993422481. The reversal of 11993422451 is 15422439911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11993422451 - 2¹⁴ = 11993406067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11993422399 and 11993422408.

It is not a weakly prime, because it can be changed into another prime (11993422411) 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 as a sum of consecutive naturals, namely, 5996711225 + 5996711226.

It is an arithmetic number, because the mean of its divisors is an integer number (5996711226).

Almost surely, 2^11993422451 is an apocalyptic number.

11993422451 is a deficient number, since it is larger than the sum of its proper divisors (1).

11993422451 is an equidigital number, since it uses as much as digits as its factorization.

11993422451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The spelling of 11993422451 in words is "eleven billion, nine hundred ninety-three million, four hundred twenty-two thousand, four hundred fifty-one".