20543106 has 16 divisors (see below), whose sum is σ = 43503264. Its totient is φ = 6444864.

The previous prime is 20543093. The next prime is 20543119. The reversal of 20543106 is 60134502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20543093) and next prime (20543119).

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, 100600 + ... + 100803.

It is an arithmetic number, because the mean of its divisors is an integer number (2718954).

Almost surely, 2^20543106 is an apocalyptic number.

20543106 is an abundant number, since it is smaller than the sum of its proper divisors (22960158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20543106 is a wasteful number, since it uses less digits than its factorization.

20543106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201425.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20543106 is about 4532.4503306710. The cubic root of 20543106 is about 273.8768782798.

Adding to 20543106 its reverse (60134502), we get a palindrome (80677608).

The spelling of 20543106 in words is "twenty million, five hundred forty-three thousand, one hundred six".