20020102511 has 2 divisors, whose sum is σ = 20020102512. Its totient is φ = 20020102510.

The previous prime is 20020102439. The next prime is 20020102519. The reversal of 20020102511 is 11520102002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020102511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020102519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010051255 + 10010051256.

It is an arithmetic number, because the mean of its divisors is an integer number (10010051256).

Almost surely, 2^20020102511 is an apocalyptic number.

20020102511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020102511 is an equidigital number, since it uses as much as digits as its factorization.

20020102511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 20020102511 its reverse (11520102002), we get a palindrome (31540204513).

The spelling of 20020102511 in words is "twenty billion, twenty million, one hundred two thousand, five hundred eleven".