21402673159 has 8 divisors (see below), whose sum is σ = 24497320320. Its totient is φ = 18317306616.

The previous prime is 21402673157. The next prime is 21402673183. The reversal of 21402673159 is 95137620412.

It is a happy number.

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

It is not a de Polignac number, because 21402673159 - 2¹ = 21402673157 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 (21402673151) 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, 2315209 + ... + 2324434.

It is an arithmetic number, because the mean of its divisors is an integer number (3062165040).

Almost surely, 2^21402673159 is an apocalyptic number.

21402673159 is a deficient number, since it is larger than the sum of its proper divisors (3094647161).

21402673159 is an equidigital number, since it uses as much as digits as its factorization.

21402673159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640309.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 21402673159 in words is "twenty-one billion, four hundred two million, six hundred seventy-three thousand, one hundred fifty-nine".