21620470341439 has 2 divisors, whose sum is σ = 21620470341440. Its totient is φ = 21620470341438.

The previous prime is 21620470341347. The next prime is 21620470341499. The reversal of 21620470341439 is 93414307402612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21620470341439 - 2⁷ = 21620470341311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21620470341499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10810235170719 + 10810235170720.

It is an arithmetic number, because the mean of its divisors is an integer number (10810235170720).

Almost surely, 2^{21620470341439} is an apocalyptic number.

21620470341439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21620470341439 is an equidigital number, since it uses as much as digits as its factorization.

21620470341439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 21620470341439 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, three hundred forty-one thousand, four hundred thirty-nine".