20535323407 has 2 divisors, whose sum is σ = 20535323408. Its totient is φ = 20535323406.

The previous prime is 20535323387. The next prime is 20535323441. The reversal of 20535323407 is 70432353502.

It is an a-pointer prime, because the next prime (20535323441) can be obtained adding 20535323407 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20535323407 - 2²⁷ = 20401105679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20535323507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267661703 + 10267661704.

It is an arithmetic number, because the mean of its divisors is an integer number (10267661704).

Almost surely, 2^20535323407 is an apocalyptic number.

20535323407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535323407 is an equidigital number, since it uses as much as digits as its factorization.

20535323407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 34.

Adding to 20535323407 its reverse (70432353502), we get a palindrome (90967676909).

The spelling of 20535323407 in words is "twenty billion, five hundred thirty-five million, three hundred twenty-three thousand, four hundred seven".