20531103 has 8 divisors (see below), whose sum is σ = 27399216. Its totient is φ = 13675200.

The previous prime is 20531099. The next prime is 20531107. The reversal of 20531103 is 30113502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20531099) and next prime (20531107).

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

It is not a de Polignac number, because 20531103 - 2² = 20531099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531107) 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, 2133 + ... + 6753.

It is an arithmetic number, because the mean of its divisors is an integer number (3424902).

Almost surely, 2^20531103 is an apocalyptic number.

20531103 is a deficient number, since it is larger than the sum of its proper divisors (6868113).

20531103 is a wasteful number, since it uses less digits than its factorization.

20531103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20531103 is about 4531.1260189935. The cubic root of 20531103 is about 273.8235272980.

Adding to 20531103 its reverse (30113502), we get a palindrome (50644605).

The spelling of 20531103 in words is "twenty million, five hundred thirty-one thousand, one hundred three".