11812421829 has 32 divisors (see below), whose sum is σ = 17117654400. Its totient is φ = 7202407680.

The previous prime is 11812421779. The next prime is 11812421837. The reversal of 11812421829 is 92812421811.

It is not a de Polignac number, because 11812421829 - 2⁸ = 11812421573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812421879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4233967 + ... + 4236755.

It is an arithmetic number, because the mean of its divisors is an integer number (534926700).

Almost surely, 2^11812421829 is an apocalyptic number.

It is an amenable number.

11812421829 is a deficient number, since it is larger than the sum of its proper divisors (5305232571).

11812421829 is a wasteful number, since it uses less digits than its factorization.

11812421829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765.

The product of its digits is 18432, while the sum is 39.

The spelling of 11812421829 in words is "eleven billion, eight hundred twelve million, four hundred twenty-one thousand, eight hundred twenty-nine".