20055505 has 8 divisors (see below), whose sum is σ = 24175872. Its totient is φ = 15971568.

The previous prime is 20055491. The next prime is 20055547. The reversal of 20055505 is 50555002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20055505 - 2⁵ = 20055473 is a prime.

It is a Duffinian 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, 7879 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (3021984).

Almost surely, 2^20055505 is an apocalyptic number.

It is an amenable number.

20055505 is a deficient number, since it is larger than the sum of its proper divisors (4120367).

20055505 is a wasteful number, since it uses less digits than its factorization.

20055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18215.

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 20055505 is about 4478.3373030624. The cubic root of 20055505 is about 271.6926359725.

The spelling of 20055505 in words is "twenty million, fifty-five thousand, five hundred five".