20590681093 has 4 divisors (see below), whose sum is σ = 20591488960. Its totient is φ = 20589873228.

The previous prime is 20590681087. The next prime is 20590681109. The reversal of 20590681093 is 39018609502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20590681093 is a prime.

It is a super-2 number, since 2×20590681093² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590687093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364413 + ... + 417106.

It is an arithmetic number, because the mean of its divisors is an integer number (5147872240).

Almost surely, 2^20590681093 is an apocalyptic number.

It is an amenable number.

20590681093 is a deficient number, since it is larger than the sum of its proper divisors (807867).

20590681093 is an equidigital number, since it uses as much as digits as its factorization.

20590681093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807866.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 20590681093 in words is "twenty billion, five hundred ninety million, six hundred eighty-one thousand, ninety-three".