20415323441 has 2 divisors, whose sum is σ = 20415323442. Its totient is φ = 20415323440.

The previous prime is 20415323419. The next prime is 20415323483. The reversal of 20415323441 is 14432351402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18879859216 + 1535464225 = 137404^2 + 39185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20415323441 - 2⁶ = 20415323377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20415323491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207661720 + 10207661721.

It is an arithmetic number, because the mean of its divisors is an integer number (10207661721).

Almost surely, 2^20415323441 is an apocalyptic number.

It is an amenable number.

20415323441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415323441 is an equidigital number, since it uses as much as digits as its factorization.

20415323441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20415323441 its reverse (14432351402), we get a palindrome (34847674843).

The spelling of 20415323441 in words is "twenty billion, four hundred fifteen million, three hundred twenty-three thousand, four hundred forty-one".