20543130 has 24 divisors (see below), whose sum is σ = 53412372. Its totient is φ = 5478144.

The previous prime is 20543119. The next prime is 20543137. The reversal of 20543130 is 3134502.

20543130 is a `hidden beast` number, since 205 + 431 + 30 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19421649 + 1121481 = 4407^2 + 1059^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20543137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114039 + ... + 114218.

Almost surely, 2^20543130 is an apocalyptic number.

20543130 is an abundant number, since it is smaller than the sum of its proper divisors (32869242).

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

20543130 is a wasteful number, since it uses less digits than its factorization.

20543130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228270 (or 228267 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20543130 is about 4532.4529782448. The cubic root of 20543130 is about 273.8769849343.

Adding to 20543130 its reverse (3134502), we get a palindrome (23677632).

It can be divided in two parts, 2054 and 3130, that added together give a square (5184 = 72²).

The spelling of 20543130 in words is "twenty million, five hundred forty-three thousand, one hundred thirty".