20351588873089 has 4 divisors (see below), whose sum is σ = 20351620331524. Its totient is φ = 20351557414656.

The previous prime is 20351588873047. The next prime is 20351588873131. The reversal of 20351588873089 is 98037888515302.

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

It is an interprime number because it is at equal distance from previous prime (20351588873047) and next prime (20351588873131).

It can be written as a sum of positive squares in 2 ways, for example, as 5332150631025 + 15019438242064 = 2309145^2 + 3875492^2 .

It is a cyclic number.

It is not a de Polignac number, because 20351588873089 - 2³¹ = 20349441389441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20351588873489) 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, 14737992 + ... + 16059625.

It is an arithmetic number, because the mean of its divisors is an integer number (5087905082881).

Almost surely, 2^{20351588873089} is an apocalyptic number.

It is an amenable number.

20351588873089 is a deficient number, since it is larger than the sum of its proper divisors (31458435).

20351588873089 is an equidigital number, since it uses as much as digits as its factorization.

20351588873089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31458434.

The product of its (nonzero) digits is 116121600, while the sum is 67.

The spelling of 20351588873089 in words is "twenty trillion, three hundred fifty-one billion, five hundred eighty-eight million, eight hundred seventy-three thousand, eighty-nine".