20890337 has 8 divisors (see below), whose sum is σ = 22806504. Its totient is φ = 19018368.

The previous prime is 20890333. The next prime is 20890343. The reversal of 20890337 is 73309802.

It can be written as a sum of positive squares in 4 ways, for example, as 2193361 + 18696976 = 1481^2 + 4324^2 .

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 20890337 - 2² = 20890333 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20890333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10058 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (2850813).

Almost surely, 2^20890337 is an apocalyptic number.

It is an amenable number.

20890337 is a deficient number, since it is larger than the sum of its proper divisors (1916167).

20890337 is a wasteful number, since it uses less digits than its factorization.

20890337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22099.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20890337 is about 4570.5948190580. The cubic root of 20890337 is about 275.4113381429.

The spelling of 20890337 in words is "twenty million, eight hundred ninety thousand, three hundred thirty-seven".