20101045 has 8 divisors (see below), whose sum is σ = 24576696. Its totient is φ = 15777216.

The previous prime is 20101013. The next prime is 20101073. The reversal of 20101045 is 54010102.

It can be written as a sum of positive squares in 4 ways, for example, as 758641 + 19342404 = 871^2 + 4398^2 .

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 20101045 - 2⁵ = 20101013 is a prime.

It is a Duffinian 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, 37662 + ... + 38191.

It is an arithmetic number, because the mean of its divisors is an integer number (3072087).

Almost surely, 2^20101045 is an apocalyptic number.

It is an amenable number.

20101045 is a deficient number, since it is larger than the sum of its proper divisors (4475651).

20101045 is an equidigital number, since it uses as much as digits as its factorization.

20101045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75911.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20101045 is about 4483.4188963335. The cubic root of 20101045 is about 271.8981245139.

Adding to 20101045 its reverse (54010102), we get a palindrome (74111147).

The spelling of 20101045 in words is "twenty million, one hundred one thousand, forty-five".