181826021147 has 8 divisors (see below), whose sum is σ = 182050252800. Its totient is φ = 181601873640.

The previous prime is 181826021131. The next prime is 181826021177. The reversal of 181826021147 is 741120628181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181826021147 - 2⁴ = 181826021131 is a prime.

It is a super-2 number, since 2×181826021147² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181826021177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5035118 + ... + 5071100.

It is an arithmetic number, because the mean of its divisors is an integer number (22756281600).

Almost surely, 2^181826021147 is an apocalyptic number.

181826021147 is a deficient number, since it is larger than the sum of its proper divisors (224231653).

181826021147 is an equidigital number, since it uses as much as digits as its factorization.

181826021147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42073.

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 181826021147 in words is "one hundred eighty-one billion, eight hundred twenty-six million, twenty-one thousand, one hundred forty-seven".