20205036 has 18 divisors (see below), whose sum is σ = 51073932. Its totient is φ = 6735000.

The previous prime is 20205023. The next prime is 20205041. The reversal of 20205036 is 63050202.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×20205036² = 816486959522592, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280590 + ... + 280661.

Almost surely, 2^20205036 is an apocalyptic number.

It is an amenable number.

20205036 is an abundant number, since it is smaller than the sum of its proper divisors (30868896).

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

20205036 is a wasteful number, since it uses less digits than its factorization.

20205036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561261 (or 561256 counting only the distinct ones).

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

The square root of 20205036 is about 4495.0012235816. The cubic root of 20205036 is about 272.3661986560.

Adding to 20205036 its reverse (63050202), we get a palindrome (83255238).

It can be divided in two parts, 2020 and 5036, that added together give a square (7056 = 84²).

The spelling of 20205036 in words is "twenty million, two hundred five thousand, thirty-six".