20601426611 has 4 divisors (see below), whose sum is σ = 20639507424. Its totient is φ = 20563345800.

The previous prime is 20601426589. The next prime is 20601426631. The reversal of 20601426611 is 11662410602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20601426611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20601426631) 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 in 3 ways as a sum of consecutive naturals, for example, 19039595 + ... + 19040676.

It is an arithmetic number, because the mean of its divisors is an integer number (5159876856).

Almost surely, 2^20601426611 is an apocalyptic number.

20601426611 is a deficient number, since it is larger than the sum of its proper divisors (38080813).

20601426611 is an equidigital number, since it uses as much as digits as its factorization.

20601426611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38080812.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 20601426611 in words is "twenty billion, six hundred one million, four hundred twenty-six thousand, six hundred eleven".