20455229 has 8 divisors (see below), whose sum is σ = 22033440. Its totient is φ = 18927216.

The previous prime is 20455219. The next prime is 20455243. The reversal of 20455229 is 92255402.

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 20455229 - 2⁴ = 20455213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11702 + ... + 13335.

It is an arithmetic number, because the mean of its divisors is an integer number (2754180).

Almost surely, 2^20455229 is an apocalyptic number.

It is an amenable number.

20455229 is a deficient number, since it is larger than the sum of its proper divisors (1578211).

20455229 is a wasteful number, since it uses less digits than its factorization.

20455229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25099.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20455229 is about 4522.7457368285. The cubic root of 20455229 is about 273.4858001578.

The spelling of 20455229 in words is "twenty million, four hundred fifty-five thousand, two hundred twenty-nine".