220475820 has 24 divisors (see below), whose sum is σ = 617332464. Its totient is φ = 58793536.

The previous prime is 220475809. The next prime is 220475831. The reversal of 220475820 is 28574022.

It is an interprime number because it is at equal distance from previous prime (220475809) and next prime (220475831).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837239 + ... + 1837358.

It is an arithmetic number, because the mean of its divisors is an integer number (25722186).

Almost surely, 2^220475820 is an apocalyptic number.

220475820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220475820 is an abundant number, since it is smaller than the sum of its proper divisors (396856644).

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

220475820 is a wasteful number, since it uses less digits than its factorization.

220475820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674609 (or 3674607 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 220475820 is about 14848.4281996446. The cubic root of 220475820 is about 604.1159777582.

The spelling of 220475820 in words is "two hundred twenty million, four hundred seventy-five thousand, eight hundred twenty".