105021638 has 16 divisors (see below), whose sum is σ = 160125984. Its totient is φ = 51649920.

The previous prime is 105021613. The next prime is 105021647. The reversal of 105021638 is 836120501.

It is a super-2 number, since 2×105021638² = 22059088896406088, which contains 22 as substring.

It is a Curzon number.

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, 107006 + ... + 107982.

It is an arithmetic number, because the mean of its divisors is an integer number (10007874).

Almost surely, 2^105021638 is an apocalyptic number.

105021638 is a deficient number, since it is larger than the sum of its proper divisors (55104346).

105021638 is an equidigital number, since it uses as much as digits as its factorization.

105021638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 105021638 is about 10248.0065378590. The cubic root of 105021638 is about 471.8018026193.

The spelling of 105021638 in words is "one hundred five million, twenty-one thousand, six hundred thirty-eight".