20538075 has 24 divisors (see below), whose sum is σ = 34122816. Its totient is φ = 10900000.

The previous prime is 20538043. The next prime is 20538109. The reversal of 20538075 is 57083502.

It is a happy number.

It is not a de Polignac number, because 20538075 - 2⁵ = 20538043 is a prime.

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, 18280 + ... + 19370.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^20538075 is an apocalyptic number.

20538075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20538075 is a deficient number, since it is larger than the sum of its proper divisors (13584741).

20538075 is a wasteful number, since it uses less digits than its factorization.

20538075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20538075 is about 4531.8952988788. The cubic root of 20538075 is about 273.8545190015.

The spelling of 20538075 in words is "twenty million, five hundred thirty-eight thousand, seventy-five".