20552538 has 32 divisors (see below), whose sum is σ = 43217856. Its totient is φ = 6507648.

The previous prime is 20552533. The next prime is 20552549. The reversal of 20552538 is 83525502.

It is not an unprimeable number, because it can be changed into a prime (20552531) 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, 8470 + ... + 10622.

It is an arithmetic number, because the mean of its divisors is an integer number (1350558).

Almost surely, 2^20552538 is an apocalyptic number.

20552538 is an abundant number, since it is smaller than the sum of its proper divisors (22665318).

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

20552538 is a wasteful number, since it uses less digits than its factorization.

20552538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238.

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

The square root of 20552538 is about 4533.4907080527. The cubic root of 20552538 is about 273.9187870913.

The spelling of 20552538 in words is "twenty million, five hundred fifty-two thousand, five hundred thirty-eight".