20339081 has 8 divisors (see below), whose sum is σ = 23506560. Its totient is φ = 17237088.

The previous prime is 20339051. The next prime is 20339087. The reversal of 20339081 is 18093302.

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

It is a cyclic number.

It is not a de Polignac number, because 20339081 - 2¹⁰ = 20338057 is a prime.

It is a super-2 number, since 2×20339081² = 827356431849122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20339081.

It is not an unprimeable number, because it can be changed into a prime (20339087) 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, 15701 + ... + 16946.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^20339081 is an apocalyptic number.

It is an amenable number.

20339081 is a deficient number, since it is larger than the sum of its proper divisors (3167479).

20339081 is an equidigital number, since it uses as much as digits as its factorization.

20339081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32743.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20339081 is about 4509.8870274099. The cubic root of 20339081 is about 272.9671855615.

The spelling of 20339081 in words is "twenty million, three hundred thirty-nine thousand, eighty-one".