21402339386147 has 8 divisors (see below), whose sum is σ = 21980970418176. Its totient is φ = 20823718324032.

The previous prime is 21402339386107. The next prime is 21402339386149. The reversal of 21402339386147 is 74168393320412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21402339386147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402339386149) 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, 1965278 + ... + 6831324.

It is an arithmetic number, because the mean of its divisors is an integer number (2747621302272).

Almost surely, 2^{21402339386147} is an apocalyptic number.

21402339386147 is a deficient number, since it is larger than the sum of its proper divisors (578631032029).

21402339386147 is a wasteful number, since it uses less digits than its factorization.

21402339386147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984957.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 21402339386147 in words is "twenty-one trillion, four hundred two billion, three hundred thirty-nine million, three hundred eighty-six thousand, one hundred forty-seven".