20459938 has 8 divisors (see below), whose sum is σ = 31680000. Its totient is φ = 9899940.

The previous prime is 20459921. The next prime is 20459939. The reversal of 20459938 is 83995402.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20459938.

It is not an unprimeable number, because it can be changed into a prime (20459939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164938 + ... + 165061.

It is an arithmetic number, because the mean of its divisors is an integer number (3960000).

Almost surely, 2^20459938 is an apocalyptic number.

20459938 is a deficient number, since it is larger than the sum of its proper divisors (11220062).

20459938 is a wasteful number, since it uses less digits than its factorization.

20459938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330032.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 20459938 is about 4523.2662977101. The cubic root of 20459938 is about 273.5067849440.

The spelling of 20459938 in words is "twenty million, four hundred fifty-nine thousand, nine hundred thirty-eight".