21382270139 has 4 divisors (see below), whose sum is σ = 21382577424. Its totient is φ = 21381962856.

The previous prime is 21382270097. The next prime is 21382270177. The reversal of 21382270139 is 93107228312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21382270139 - 2²⁴ = 21365492923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21382270439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6089 + ... + 206885.

It is an arithmetic number, because the mean of its divisors is an integer number (5345644356).

Almost surely, 2^21382270139 is an apocalyptic number.

21382270139 is a deficient number, since it is larger than the sum of its proper divisors (307285).

21382270139 is a wasteful number, since it uses less digits than its factorization.

21382270139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307284.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 21382270139 in words is "twenty-one billion, three hundred eighty-two million, two hundred seventy thousand, one hundred thirty-nine".