30636020 has 24 divisors (see below), whose sum is σ = 65906568. Its totient is φ = 11955200.

The previous prime is 30635993. The next prime is 30636041. The reversal of 30636020 is 2063603.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 583696 + 30052324 = 764^2 + 5482^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30635983 and 30636001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17861 + ... + 19500.

It is an arithmetic number, because the mean of its divisors is an integer number (2746107).

Almost surely, 2^30636020 is an apocalyptic number.

It is an amenable number.

30636020 is an abundant number, since it is smaller than the sum of its proper divisors (35270548).

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

30636020 is a wasteful number, since it uses less digits than its factorization.

30636020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37411 (or 37409 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 30636020 is about 5534.9814814505. The cubic root of 30636020 is about 312.9037597053.

Adding to 30636020 its reverse (2063603), we get a palindrome (32699623).

The spelling of 30636020 in words is "thirty million, six hundred thirty-six thousand, twenty".