20535255 has 32 divisors (see below), whose sum is σ = 39318720. Its totient is φ = 10108800.

The previous prime is 20535253. The next prime is 20535271. The reversal of 20535255 is 55253502.

It is not a de Polignac number, because 20535255 - 2¹ = 20535253 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4096 + ... + 7605.

It is an arithmetic number, because the mean of its divisors is an integer number (1228710).

Almost surely, 2^20535255 is an apocalyptic number.

20535255 is a deficient number, since it is larger than the sum of its proper divisors (18783465).

20535255 is a wasteful number, since it uses less digits than its factorization.

20535255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728 (or 11722 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 20535255 is about 4531.5841600924. The cubic root of 20535255 is about 273.8419844758.

Adding to 20535255 its reverse (55253502), we get a palindrome (75788757).

The spelling of 20535255 in words is "twenty million, five hundred thirty-five thousand, two hundred fifty-five".