20038520 has 48 divisors (see below), whose sum is σ = 47181960. Its totient is φ = 7658816.

The previous prime is 20038481. The next prime is 20038531. The reversal of 20038520 is 2583002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20038492 and 20038501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20687 + ... + 21633.

Almost surely, 2^20038520 is an apocalyptic number.

20038520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20038520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23590980).

20038520 is an abundant number, since it is smaller than the sum of its proper divisors (27143440).

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

20038520 is a wasteful number, since it uses less digits than its factorization.

20038520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20038520 is about 4476.4405502587. The cubic root of 20038520 is about 271.6159155115.

The spelling of 20038520 in words is "twenty million, thirty-eight thousand, five hundred twenty".