20500038 has 72 divisors (see below), whose sum is σ = 50358672. Its totient is φ = 6012864.

The previous prime is 20500033. The next prime is 20500049. The reversal of 20500038 is 83000502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500033) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69820 + ... + 70112.

It is an arithmetic number, because the mean of its divisors is an integer number (699426).

Almost surely, 2^20500038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20500038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25179336).

20500038 is an abundant number, since it is smaller than the sum of its proper divisors (29858634).

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

20500038 is a wasteful number, since it uses less digits than its factorization.

20500038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20500038 is about 4527.6967654648. The cubic root of 20500038 is about 273.6853528461.

The spelling of 20500038 in words is "twenty million, five hundred thousand, thirty-eight".