2105213638 has 8 divisors (see below), whose sum is σ = 3444895080. Its totient is φ = 956915280.

The previous prime is 2105213611. The next prime is 2105213641. The reversal of 2105213638 is 8363125012.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 47845743 + ... + 47845786.

It is an arithmetic number, because the mean of its divisors is an integer number (430611885).

Almost surely, 2^2105213638 is an apocalyptic number.

2105213638 is a deficient number, since it is larger than the sum of its proper divisors (1339681442).

2105213638 is a wasteful number, since it uses less digits than its factorization.

2105213638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95691542.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2105213638 is about 45882.6071403969. The cubic root of 2105213638 is about 1281.6380473065.

The spelling of 2105213638 in words is "two billion, one hundred five million, two hundred thirteen thousand, six hundred thirty-eight".