20538252 has 72 divisors (see below), whose sum is σ = 61956720. Its totient is φ = 5866560.

The previous prime is 20538239. The next prime is 20538283. The reversal of 20538252 is 25283502.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 3352 + ... + 7232.

It is an arithmetic number, because the mean of its divisors is an integer number (860510).

Almost surely, 2^20538252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20538252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30978360).

20538252 is an abundant number, since it is smaller than the sum of its proper divisors (41418468).

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

20538252 is a wasteful number, since it uses less digits than its factorization.

20538252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908 (or 3893 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20538252 is about 4531.9148270902. The cubic root of 20538252 is about 273.8553057048.

The spelling of 20538252 in words is "twenty million, five hundred thirty-eight thousand, two hundred fifty-two".