21106147339 has 2 divisors, whose sum is σ = 21106147340. Its totient is φ = 21106147338.

The previous prime is 21106147319. The next prime is 21106147427. The reversal of 21106147339 is 93374160112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21106147339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21106147298 and 21106147307.

It is not a weakly prime, because it can be changed into another prime (21106147319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553073669 + 10553073670.

It is an arithmetic number, because the mean of its divisors is an integer number (10553073670).

Almost surely, 2^21106147339 is an apocalyptic number.

21106147339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21106147339 is an equidigital number, since it uses as much as digits as its factorization.

21106147339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 21106147339 in words is "twenty-one billion, one hundred six million, one hundred forty-seven thousand, three hundred thirty-nine".