20135420363 has 2 divisors, whose sum is σ = 20135420364. Its totient is φ = 20135420362.

The previous prime is 20135420257. The next prime is 20135420401. The reversal of 20135420363 is 36302453102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20135420363 - 2¹⁴ = 20135403979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20135440363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067710181 + 10067710182.

It is an arithmetic number, because the mean of its divisors is an integer number (10067710182).

Almost surely, 2^20135420363 is an apocalyptic number.

20135420363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20135420363 is an equidigital number, since it uses as much as digits as its factorization.

20135420363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 20135420363 its reverse (36302453102), we get a palindrome (56437873465).

The spelling of 20135420363 in words is "twenty billion, one hundred thirty-five million, four hundred twenty thousand, three hundred sixty-three".