20455235 has 4 divisors (see below), whose sum is σ = 24546288. Its totient is φ = 16364184.

The previous prime is 20455219. The next prime is 20455243. The reversal of 20455235 is 53255402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53255402 = 2 ⋅26627701.

It is a cyclic number.

It is not a de Polignac number, because 20455235 - 2⁴ = 20455219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045519 + ... + 2045528.

It is an arithmetic number, because the mean of its divisors is an integer number (6136572).

Almost surely, 2^20455235 is an apocalyptic number.

20455235 is a deficient number, since it is larger than the sum of its proper divisors (4091053).

20455235 is an equidigital number, since it uses as much as digits as its factorization.

20455235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091052.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 20455235 is about 4522.7464001423. The cubic root of 20455235 is about 273.4858268977.

The spelling of 20455235 in words is "twenty million, four hundred fifty-five thousand, two hundred thirty-five".