20031620289 has 8 divisors (see below), whose sum is σ = 27277100160. Its totient is φ = 13070276976.

The previous prime is 20031620281. The next prime is 20031620317. The reversal of 20031620289 is 98202613002.

It is a happy number.

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

It is not a de Polignac number, because 20031620289 - 2³ = 20031620281 is a prime.

It is a super-2 number, since 2×20031620289² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20031620281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71033974 + ... + 71034255.

It is an arithmetic number, because the mean of its divisors is an integer number (3409637520).

Almost surely, 2^20031620289 is an apocalyptic number.

It is an amenable number.

20031620289 is a deficient number, since it is larger than the sum of its proper divisors (7245479871).

20031620289 is a wasteful number, since it uses less digits than its factorization.

20031620289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142068279.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20031620289 in words is "twenty billion, thirty-one million, six hundred twenty thousand, two hundred eighty-nine".