20455255 has 8 divisors (see below), whose sum is σ = 24740352. Its totient is φ = 16234848.

The previous prime is 20455249. The next prime is 20455261. The reversal of 20455255 is 55255402.

It is an interprime number because it is at equal distance from previous prime (20455249) and next prime (20455261).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20455255 is a prime.

It is a Duffinian number.

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, 15472 + ... + 16741.

It is an arithmetic number, because the mean of its divisors is an integer number (3092544).

Almost surely, 2^20455255 is an apocalyptic number.

20455255 is a deficient number, since it is larger than the sum of its proper divisors (4285097).

20455255 is a wasteful number, since it uses less digits than its factorization.

20455255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32345.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 20455255 is about 4522.7486111877. The cubic root of 20455255 is about 273.4859160308.

The spelling of 20455255 in words is "twenty million, four hundred fifty-five thousand, two hundred fifty-five".