20534245 has 16 divisors (see below), whose sum is σ = 25648128. Its totient is φ = 15765120.

The previous prime is 20534237. The next prime is 20534257. The reversal of 20534245 is 54243502.

It is not a de Polignac number, because 20534245 - 2³ = 20534237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20752 + ... + 21718.

It is an arithmetic number, because the mean of its divisors is an integer number (1603008).

Almost surely, 2^20534245 is an apocalyptic number.

It is an amenable number.

20534245 is a deficient number, since it is larger than the sum of its proper divisors (5113883).

20534245 is a wasteful number, since it uses less digits than its factorization.

20534245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 20534245 is about 4531.4727186644. The cubic root of 20534245 is about 273.8374948807.

Adding to 20534245 its reverse (54243502), we get a palindrome (74777747).

The spelling of 20534245 in words is "twenty million, five hundred thirty-four thousand, two hundred forty-five".