19880220 has 24 divisors (see below), whose sum is σ = 55664784. Its totient is φ = 5301376.

The previous prime is 19880149. The next prime is 19880221. The reversal of 19880220 is 2208891.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19880221) 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, 165609 + ... + 165728.

It is an arithmetic number, because the mean of its divisors is an integer number (2319366).

Almost surely, 2^19880220 is an apocalyptic number.

19880220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19880220 is an abundant number, since it is smaller than the sum of its proper divisors (35784564).

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

19880220 is a wasteful number, since it uses less digits than its factorization.

19880220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331349 (or 331347 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 19880220 is about 4458.7240327251. The cubic root of 19880220 is about 270.8987880193.

It can be divided in two parts, 19880 and 220, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 19880220 in words is "nineteen million, eight hundred eighty thousand, two hundred twenty".