20105254 has 24 divisors (see below), whose sum is σ = 34587000. Its totient is φ = 8731008.

The previous prime is 20105251. The next prime is 20105257. The reversal of 20105254 is 45250102.

It is an interprime number because it is at equal distance from previous prime (20105251) and next prime (20105257).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3997 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (1441125).

Almost surely, 2^20105254 is an apocalyptic number.

20105254 is a deficient number, since it is larger than the sum of its proper divisors (14481746).

20105254 is a wasteful number, since it uses less digits than its factorization.

20105254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20105254 is about 4483.8882680103. Note that the first 3 decimals coincide. The cubic root of 20105254 is about 271.9171009624.

Adding to 20105254 its reverse (45250102), we get a palindrome (65355356).

The spelling of 20105254 in words is "twenty million, one hundred five thousand, two hundred fifty-four".