20255121 has 24 divisors (see below), whose sum is σ = 31799040. Its totient is φ = 12376800.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255121 is 12155202.

It is not a de Polignac number, because 20255121 - 2² = 20255117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20255094 and 20255103.

It is not an unprimeable number, because it can be changed into a prime (20255161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3391 + ... + 7211.

It is an arithmetic number, because the mean of its divisors is an integer number (1324960).

Almost surely, 2^20255121 is an apocalyptic number.

It is an amenable number.

20255121 is a deficient number, since it is larger than the sum of its proper divisors (11543919).

20255121 is a wasteful number, since it uses less digits than its factorization.

20255121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877 (or 3874 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 20255121 is about 4500.5689640311. The cubic root of 20255121 is about 272.5910634686.

The spelling of 20255121 in words is "twenty million, two hundred fifty-five thousand, one hundred twenty-one".