20390508709234 has 8 divisors (see below), whose sum is σ = 30587477662080. Its totient is φ = 10194682821876.

The previous prime is 20390508709189. The next prime is 20390508709267. The reversal of 20390508709234 is 43290780509302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285721774 + ... + 285793129.

It is an arithmetic number, because the mean of its divisors is an integer number (3823434707760).

Almost surely, 2^{20390508709234} is an apocalyptic number.

20390508709234 is a deficient number, since it is larger than the sum of its proper divisors (10196968952846).

20390508709234 is a wasteful number, since it uses less digits than its factorization.

20390508709234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571532744.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 20390508709234 in words is "twenty trillion, three hundred ninety billion, five hundred eight million, seven hundred nine thousand, two hundred thirty-four".