20250105 has 32 divisors (see below), whose sum is σ = 34957440. Its totient is φ = 9976320.

The previous prime is 20250101. The next prime is 20250121. The reversal of 20250105 is 50105202.

It is not a de Polignac number, because 20250105 - 2² = 20250101 is a prime.

It is a super-2 number, since 2×20250105² = 820133505022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20250101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10819 + ... + 12551.

It is an arithmetic number, because the mean of its divisors is an integer number (1092420).

Almost surely, 2^20250105 is an apocalyptic number.

It is an amenable number.

20250105 is a deficient number, since it is larger than the sum of its proper divisors (14707335).

20250105 is a wasteful number, since it uses less digits than its factorization.

20250105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20250105 is about 4500.0116666515. The cubic root of 20250105 is about 272.5685600293.

Adding to 20250105 its reverse (50105202), we get a palindrome (70355307).

The spelling of 20250105 in words is "twenty million, two hundred fifty thousand, one hundred five".