20101849 has 8 divisors (see below), whose sum is σ = 20691720. Its totient is φ = 19516800.

The previous prime is 20101847. The next prime is 20101877. The reversal of 20101849 is 94810102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7463824 + 12638025 = 2732^2 + 3555^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20101849 - 2¹ = 20101847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8319 + ... + 10459.

It is an arithmetic number, because the mean of its divisors is an integer number (2586465).

Almost surely, 2^20101849 is an apocalyptic number.

It is an amenable number.

20101849 is a deficient number, since it is larger than the sum of its proper divisors (589871).

20101849 is a wasteful number, since it uses less digits than its factorization.

20101849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 20101849 is about 4483.5085591532. The cubic root of 20101849 is about 271.9017495854.

The spelling of 20101849 in words is "twenty million, one hundred one thousand, eight hundred forty-nine".