20107543 has 8 divisors (see below), whose sum is σ = 21038688. Its totient is φ = 19181184.

The previous prime is 20107541. The next prime is 20107553. The reversal of 20107543 is 34570102.

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 20107543 - 2¹ = 20107541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20107541) 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, 9555 + ... + 11467.

It is an arithmetic number, because the mean of its divisors is an integer number (2629836).

Almost surely, 2^20107543 is an apocalyptic number.

20107543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20107543 is a deficient number, since it is larger than the sum of its proper divisors (931145).

20107543 is a wasteful number, since it uses less digits than its factorization.

20107543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20107543 is about 4484.1435079623. The cubic root of 20107543 is about 271.9274199007.

Adding to 20107543 its reverse (34570102), we get a palindrome (54677645).

The spelling of 20107543 in words is "twenty million, one hundred seven thousand, five hundred forty-three".