20440072463 has 2 divisors, whose sum is σ = 20440072464. Its totient is φ = 20440072462.

The previous prime is 20440072421. The next prime is 20440072493. The reversal of 20440072463 is 36427004402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20440072463 - 2⁸ = 20440072207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440072493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220036231 + 10220036232.

It is an arithmetic number, because the mean of its divisors is an integer number (10220036232).

Almost surely, 2^20440072463 is an apocalyptic number.

20440072463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440072463 is an equidigital number, since it uses as much as digits as its factorization.

20440072463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 32.

Adding to 20440072463 its reverse (36427004402), we get a palindrome (56867076865).

The spelling of 20440072463 in words is "twenty billion, four hundred forty million, seventy-two thousand, four hundred sixty-three".