20501430002531 has 2 divisors, whose sum is σ = 20501430002532. Its totient is φ = 20501430002530.

The previous prime is 20501430002429. The next prime is 20501430002533. The reversal of 20501430002531 is 13520003410502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20501430002531 is a prime.

It is a super-2 number, since 2×20501430002531² (a number of 27 digits) contains 22 as substring.

Together with 20501430002533, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20501430002531.

It is not a weakly prime, because it can be changed into another prime (20501430002533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250715001265 + 10250715001266.

It is an arithmetic number, because the mean of its divisors is an integer number (10250715001266).

Almost surely, 2^{20501430002531} is an apocalyptic number.

20501430002531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20501430002531 is an equidigital number, since it uses as much as digits as its factorization.

20501430002531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 20501430002531 in words is "twenty trillion, five hundred one billion, four hundred thirty million, two thousand, five hundred thirty-one".