20231855 has 32 divisors (see below), whose sum is σ = 29030400. Its totient is φ = 13524000.

The previous prime is 20231843. The next prime is 20231857. The reversal of 20231855 is 55813202.

It is not a de Polignac number, because 20231855 - 2⁴ = 20231839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80480 + ... + 80730.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^20231855 is an apocalyptic number.

20231855 is a deficient number, since it is larger than the sum of its proper divisors (8798545).

20231855 is an equidigital number, since it uses as much as digits as its factorization.

20231855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20231855 is about 4497.9834370527. The cubic root of 20231855 is about 272.4866531072.

The spelling of 20231855 in words is "twenty million, two hundred thirty-one thousand, eight hundred fifty-five".