20590681066 has 32 divisors (see below), whose sum is σ = 31561770240. Its totient is φ = 10072472256.

The previous prime is 20590681057. The next prime is 20590681081. The reversal of 20590681066 is 66018609502.

It is a super-2 number, since 2×20590681066² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14408440 + ... + 14409868.

It is an arithmetic number, because the mean of its divisors is an integer number (986305320).

Almost surely, 2^20590681066 is an apocalyptic number.

20590681066 is a deficient number, since it is larger than the sum of its proper divisors (10971089174).

20590681066 is a wasteful number, since it uses less digits than its factorization.

20590681066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 20590681066 in words is "twenty billion, five hundred ninety million, six hundred eighty-one thousand, sixty-six".