20590905611 has 2 divisors, whose sum is σ = 20590905612. Its totient is φ = 20590905610.

The previous prime is 20590905593. The next prime is 20590905637. The reversal of 20590905611 is 11650909502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20590905611 - 2⁶ = 20590905547 is a prime.

It is a super-2 number, since 2×20590905611² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20590902611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10295452805 + 10295452806.

It is an arithmetic number, because the mean of its divisors is an integer number (10295452806).

Almost surely, 2^20590905611 is an apocalyptic number.

20590905611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20590905611 is an equidigital number, since it uses as much as digits as its factorization.

20590905611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 20590905611 in words is "twenty billion, five hundred ninety million, nine hundred five thousand, six hundred eleven".