1220342020 has 48 divisors (see below), whose sum is σ = 2608236288. Its totient is φ = 479508480.

The previous prime is 1220342009. The next prime is 1220342033. The reversal of 1220342020 is 202430221.

It is a junction number, because it is equal to n+sod(n) for n = 1220341985 and 1220342003.

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 15 ways as a sum of consecutive naturals, for example, 576484 + ... + 578596.

It is an arithmetic number, because the mean of its divisors is an integer number (54338256).

Almost surely, 2^1220342020 is an apocalyptic number.

1220342020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220342020 is an abundant number, since it is smaller than the sum of its proper divisors (1387894268).

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

1220342020 is a wasteful number, since it uses less digits than its factorization.

1220342020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1220342020 is about 34933.3940521101. The cubic root of 1220342020 is about 1068.6295728790.

Adding to 1220342020 its reverse (202430221), we get a palindrome (1422772241).

The spelling of 1220342020 in words is "one billion, two hundred twenty million, three hundred forty-two thousand, twenty".