20066634513 has 12 divisors (see below), whose sum is σ = 28988842740. Its totient is φ = 13376046816.

The previous prime is 20066634509. The next prime is 20066634547. The reversal of 20066634513 is 31543666002.

It can be written as a sum of positive squares in 2 ways, for example, as 10887461649 + 9179172864 = 104343^2 + 95808^2 .

It is not a de Polignac number, because 20066634513 - 2² = 20066634509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20066634113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65958 + ... + 210911.

It is an arithmetic number, because the mean of its divisors is an integer number (2415736895).

Almost surely, 2^20066634513 is an apocalyptic number.

It is an amenable number.

20066634513 is a deficient number, since it is larger than the sum of its proper divisors (8922208227).

20066634513 is a wasteful number, since it uses less digits than its factorization.

20066634513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284928 (or 284925 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20066634513 in words is "twenty billion, sixty-six million, six hundred thirty-four thousand, five hundred thirteen".