243632020 has 24 divisors (see below), whose sum is σ = 522514944. Its totient is φ = 95378976.

The previous prime is 243632009. The next prime is 243632029. The reversal of 243632020 is 20236342.

It is a happy number.

It is a super-2 number, since 2×243632020² = 118713122338560800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243631982 and 243632000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243632029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 128652 + ... + 130531.

It is an arithmetic number, because the mean of its divisors is an integer number (21771456).

Almost surely, 2^243632020 is an apocalyptic number.

243632020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243632020 is an abundant number, since it is smaller than the sum of its proper divisors (278882924).

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

243632020 is a wasteful number, since it uses less digits than its factorization.

243632020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259239 (or 259237 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243632020 is about 15608.7161547643. The cubic root of 243632020 is about 624.5656886678.

Adding to 243632020 its reverse (20236342), we get a palindrome (263868362).

The spelling of 243632020 in words is "two hundred forty-three million, six hundred thirty-two thousand, twenty".