20238455 has 8 divisors (see below), whose sum is σ = 24343632. Its totient is φ = 16152448.

The previous prime is 20238437. The next prime is 20238469. The reversal of 20238455 is 55483202.

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 20238455 - 2⁶ = 20238391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354 + ... + 6783.

It is an arithmetic number, because the mean of its divisors is an integer number (3042954).

Almost surely, 2^20238455 is an apocalyptic number.

20238455 is a deficient number, since it is larger than the sum of its proper divisors (4105177).

20238455 is an equidigital number, since it uses as much as digits as its factorization.

20238455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9585.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20238455 is about 4498.7170393347. The cubic root of 20238455 is about 272.5162799240.

The spelling of 20238455 in words is "twenty million, two hundred thirty-eight thousand, four hundred fifty-five".