20485655 has 16 divisors (see below), whose sum is σ = 25297920. Its totient is φ = 15917472.

The previous prime is 20485639. The next prime is 20485669. The reversal of 20485655 is 55658402.

It is a cyclic number.

It is not a de Polignac number, because 20485655 - 2⁴ = 20485639 is a prime.

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, 41822 + ... + 42308.

It is an arithmetic number, because the mean of its divisors is an integer number (1581120).

Almost surely, 2^20485655 is an apocalyptic number.

20485655 is a deficient number, since it is larger than the sum of its proper divisors (4812265).

20485655 is a wasteful number, since it uses less digits than its factorization.

20485655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 20485655 is about 4526.1081516022. The cubic root of 20485655 is about 273.6213312185.

The spelling of 20485655 in words is "twenty million, four hundred eighty-five thousand, six hundred fifty-five".