20555465 has 32 divisors (see below), whose sum is σ = 30170880. Its totient is φ = 13123584.

The previous prime is 20555453. The next prime is 20555477. The reversal of 20555465 is 56455502.

It is an interprime number because it is at equal distance from previous prime (20555453) and next prime (20555477).

It is a cyclic number.

It is not a de Polignac number, because 20555465 - 2⁸ = 20555209 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106409 + ... + 106601.

It is an arithmetic number, because the mean of its divisors is an integer number (942840).

Almost surely, 2^20555465 is an apocalyptic number.

It is an amenable number.

20555465 is a deficient number, since it is larger than the sum of its proper divisors (9615415).

20555465 is a wasteful number, since it uses less digits than its factorization.

20555465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 20555465 is about 4533.8135162355. The cubic root of 20555465 is about 273.9317899012.

The spelling of 20555465 in words is "twenty million, five hundred fifty-five thousand, four hundred sixty-five".