20260511 has 2 divisors, whose sum is σ = 20260512. Its totient is φ = 20260510.

The previous prime is 20260477. The next prime is 20260523. The reversal of 20260511 is 11506202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20260511 - 2¹⁸ = 19998367 is a prime.

It is a super-2 number, since 2×20260511² = 820976611962242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20260511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20260211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130255 + 10130256.

It is an arithmetic number, because the mean of its divisors is an integer number (10130256).

Almost surely, 2^20260511 is an apocalyptic number.

20260511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20260511 is an equidigital number, since it uses as much as digits as its factorization.

20260511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20260511 is about 4501.1677373766. The cubic root of 20260511 is about 272.6152406553.

Adding to 20260511 its reverse (11506202), we get a palindrome (31766713).

The spelling of 20260511 in words is "twenty million, two hundred sixty thousand, five hundred eleven".