20113545 has 8 divisors (see below), whose sum is σ = 32181696. Its totient is φ = 10727216.

The previous prime is 20113537. The next prime is 20113547. The reversal of 20113545 is 54531102.

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 20113545 - 2³ = 20113537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20113547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670437 + ... + 670466.

It is an arithmetic number, because the mean of its divisors is an integer number (4022712).

Almost surely, 2^20113545 is an apocalyptic number.

It is an amenable number.

20113545 is a deficient number, since it is larger than the sum of its proper divisors (12068151).

20113545 is a wasteful number, since it uses less digits than its factorization.

20113545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340911.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20113545 is about 4484.8127051194. The cubic root of 20113545 is about 271.9544735294.

Adding to 20113545 its reverse (54531102), we get a palindrome (74644647).

The spelling of 20113545 in words is "twenty million, one hundred thirteen thousand, five hundred forty-five".