21669382151 has 8 divisors (see below), whose sum is σ = 22083006240. Its totient is φ = 21255934752.

The previous prime is 21669382121. The next prime is 21669382177. The reversal of 21669382151 is 15128396612.

It is a happy number.

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 21669382151 - 2¹⁰ = 21669381127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21669382121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218165 + ... + 301553.

It is an arithmetic number, because the mean of its divisors is an integer number (2760375780).

Almost surely, 2^21669382151 is an apocalyptic number.

21669382151 is a deficient number, since it is larger than the sum of its proper divisors (413624089).

21669382151 is an equidigital number, since it uses as much as digits as its factorization.

21669382151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88345.

The product of its digits is 155520, while the sum is 44.

The spelling of 21669382151 in words is "twenty-one billion, six hundred sixty-nine million, three hundred eighty-two thousand, one hundred fifty-one".