220142660 has 24 divisors (see below), whose sum is σ = 482400576. Its totient is φ = 84228320.

The previous prime is 220142651. The next prime is 220142677. The reversal of 220142660 is 66241022.

220142660 is digitally balanced in base 3, 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 (23).

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 7 ways as a sum of consecutive naturals, for example, 238826 + ... + 239745.

It is an arithmetic number, because the mean of its divisors is an integer number (20100024).

Almost surely, 2^220142660 is an apocalyptic number.

220142660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220142660 is an abundant number, since it is smaller than the sum of its proper divisors (262257916).

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

220142660 is a wasteful number, since it uses less digits than its factorization.

220142660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478603 (or 478601 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 220142660 is about 14837.2052624475. The cubic root of 220142660 is about 603.8115320638.

Adding to 220142660 its reverse (66241022), we get a palindrome (286383682).

The spelling of 220142660 in words is "two hundred twenty million, one hundred forty-two thousand, six hundred sixty".