20389338 has 48 divisors (see below), whose sum is σ = 45714240. Its totient is φ = 6564672.

The previous prime is 20389319. The next prime is 20389357. The reversal of 20389338 is 83398302.

It is an interprime number because it is at equal distance from previous prime (20389319) and next prime (20389357).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77395 + ... + 77657.

It is an arithmetic number, because the mean of its divisors is an integer number (952380).

Almost surely, 2^20389338 is an apocalyptic number.

20389338 is an abundant number, since it is smaller than the sum of its proper divisors (25324902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20389338 is a wasteful number, since it uses less digits than its factorization.

20389338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20389338 is about 4515.4554587550. The cubic root of 20389338 is about 273.1918307171.

The spelling of 20389338 in words is "twenty million, three hundred eighty-nine thousand, three hundred thirty-eight".