243142020 has 96 divisors (see below), whose sum is σ = 825229440. Its totient is φ = 58942080.

The previous prime is 243142019. The next prime is 243142027. The reversal of 243142020 is 20241342.

243142020 is a `hidden beast` number, since 243 + 1 + 420 + 2 + 0 = 666.

243142020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 243141984 and 243142002.

It is not an unprimeable number, because it can be changed into a prime (243142027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14527 + ... + 26406.

It is an arithmetic number, because the mean of its divisors is an integer number (8596140).

Almost surely, 2^243142020 is an apocalyptic number.

243142020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243142020 is an abundant number, since it is smaller than the sum of its proper divisors (582087420).

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

243142020 is a wasteful number, since it uses less digits than its factorization.

243142020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40962 (or 40954 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 243142020 is about 15593.0118963592. The cubic root of 243142020 is about 624.1466925832.

Adding to 243142020 its reverse (20241342), we get a palindrome (263383362).

The spelling of 243142020 in words is "two hundred forty-three million, one hundred forty-two thousand, twenty".