20545300 has 18 divisors (see below), whose sum is σ = 44583518. Its totient is φ = 8218080.

The previous prime is 20545277. The next prime is 20545303. The reversal of 20545300 is 354502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 367236 + 20178064 = 606^2 + 4492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102627 + ... + 102826.

Almost surely, 2^20545300 is an apocalyptic number.

20545300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20545300 is an abundant number, since it is smaller than the sum of its proper divisors (24038218).

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

20545300 is a wasteful number, since it uses less digits than its factorization.

20545300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205467 (or 205460 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20545300 is about 4532.6923566463. The cubic root of 20545300 is about 273.8866279331.

Adding to 20545300 its reverse (354502), we get a palindrome (20899802).

The spelling of 20545300 in words is "twenty million, five hundred forty-five thousand, three hundred".