20071245 has 16 divisors (see below), whose sum is σ = 32179392. Its totient is φ = 10682880.

The previous prime is 20071217. The next prime is 20071267. The reversal of 20071245 is 54217002.

It is not a de Polignac number, because 20071245 - 2⁵ = 20071213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8605 + ... + 10685.

It is an arithmetic number, because the mean of its divisors is an integer number (2011212).

Almost surely, 2^20071245 is an apocalyptic number.

It is an amenable number.

20071245 is a deficient number, since it is larger than the sum of its proper divisors (12108147).

20071245 is a wasteful number, since it uses less digits than its factorization.

20071245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20071245 is about 4480.0943070431. The cubic root of 20071245 is about 271.7636941654.

Adding to 20071245 its reverse (54217002), we get a palindrome (74288247).

The spelling of 20071245 in words is "twenty million, seventy-one thousand, two hundred forty-five".