20100445 has 8 divisors (see below), whose sum is σ = 24164280. Its totient is φ = 16051200.

The previous prime is 20100439. The next prime is 20100463. The reversal of 20100445 is 54400102.

It can be written as a sum of positive squares in 4 ways, for example, as 8191044 + 11909401 = 2862^2 + 3451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20100445 - 2⁷ = 20100317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (3020535).

Almost surely, 2^20100445 is an apocalyptic number.

It is an amenable number.

20100445 is a deficient number, since it is larger than the sum of its proper divisors (4063835).

20100445 is an equidigital number, since it uses as much as digits as its factorization.

20100445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20100445 is about 4483.3519826130. The cubic root of 20100445 is about 271.8954191737.

Adding to 20100445 its reverse (54400102), we get a palindrome (74500547).

The spelling of 20100445 in words is "twenty million, one hundred thousand, four hundred forty-five".