20538552 has 64 divisors (see below), whose sum is σ = 53488800. Its totient is φ = 6566400.

The previous prime is 20538527. The next prime is 20538559. The reversal of 20538552 is 25583502.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20538559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89574 + ... + 89802.

Almost surely, 2^20538552 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 20538552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26744400).

20538552 is an abundant number, since it is smaller than the sum of its proper divisors (32950248).

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

20538552 is a wasteful number, since it uses less digits than its factorization.

20538552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 20538552 is about 4531.9479255614. The cubic root of 20538552 is about 273.8566390898.

The spelling of 20538552 in words is "twenty million, five hundred thirty-eight thousand, five hundred fifty-two".