20530403087 has 2 divisors, whose sum is σ = 20530403088. Its totient is φ = 20530403086.

The previous prime is 20530402987. The next prime is 20530403119. The reversal of 20530403087 is 78030403502.

It is a happy number.

It is an a-pointer prime, because the next prime (20530403119) can be obtained adding 20530403087 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20530403087 - 2¹² = 20530398991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20530403287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265201543 + 10265201544.

It is an arithmetic number, because the mean of its divisors is an integer number (10265201544).

Almost surely, 2^20530403087 is an apocalyptic number.

20530403087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20530403087 is an equidigital number, since it uses as much as digits as its factorization.

20530403087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 20530403087 its reverse (78030403502), we get a palindrome (98560806589).

The spelling of 20530403087 in words is "twenty billion, five hundred thirty million, four hundred three thousand, eighty-seven".