20565454 has 16 divisors (see below), whose sum is σ = 37967328. Its totient is φ = 8135712.

The previous prime is 20565443. The next prime is 20565463. The reversal of 20565454 is 45456502.

It is a super-2 number, since 2×20565454² = 845875796452232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56317 + ... + 56680.

It is an arithmetic number, because the mean of its divisors is an integer number (2372958).

Almost surely, 2^20565454 is an apocalyptic number.

20565454 is a deficient number, since it is larger than the sum of its proper divisors (17401874).

20565454 is a wasteful number, since it uses less digits than its factorization.

20565454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113019.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 20565454 is about 4534.9149936906. The cubic root of 20565454 is about 273.9761554187.

The spelling of 20565454 in words is "twenty million, five hundred sixty-five thousand, four hundred fifty-four".