20089831458817 has 4 divisors (see below), whose sum is σ = 20178332919216. Its totient is φ = 20001329998420.

The previous prime is 20089831458743. The next prime is 20089831458833. The reversal of 20089831458817 is 71885413898002.

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-20089831458817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20089831458617) 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, 44250729859 + ... + 44250730312.

It is an arithmetic number, because the mean of its divisors is an integer number (5044583229804).

Almost surely, 2^{20089831458817} is an apocalyptic number.

It is an amenable number.

20089831458817 is a deficient number, since it is larger than the sum of its proper divisors (88501460399).

20089831458817 is an equidigital number, since it uses as much as digits as its factorization.

20089831458817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88501460398.

The product of its (nonzero) digits is 30965760, while the sum is 64.

The spelling of 20089831458817 in words is "twenty trillion, eighty-nine billion, eight hundred thirty-one million, four hundred fifty-eight thousand, eight hundred seventeen".