20505254 has 32 divisors (see below), whose sum is σ = 39177216. Its totient is φ = 7816320.

The previous prime is 20505253. The next prime is 20505257. The reversal of 20505254 is 45250502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20505253) 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, 5822 + ... + 8654.

It is an arithmetic number, because the mean of its divisors is an integer number (1224288).

Almost surely, 2^20505254 is an apocalyptic number.

20505254 is a deficient number, since it is larger than the sum of its proper divisors (18671962).

20505254 is a wasteful number, since it uses less digits than its factorization.

20505254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20505254 is about 4528.2727391358. The cubic root of 20505254 is about 273.7085629127.

Adding to 20505254 its reverse (45250502), we get a palindrome (65755756).

The spelling of 20505254 in words is "twenty million, five hundred five thousand, two hundred fifty-four".