20402184220 has 24 divisors (see below), whose sum is σ = 46739549808. Its totient is φ = 7418976000.

The previous prime is 20402184203. The next prime is 20402184221. The reversal of 20402184220 is 2248120402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402184221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46368381 + ... + 46368820.

It is an arithmetic number, because the mean of its divisors is an integer number (1947481242).

Almost surely, 2^20402184220 is an apocalyptic number.

20402184220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402184220 is an abundant number, since it is smaller than the sum of its proper divisors (26337365588).

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

20402184220 is a wasteful number, since it uses less digits than its factorization.

20402184220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92737221 (or 92737219 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The spelling of 20402184220 in words is "twenty billion, four hundred two million, one hundred eighty-four thousand, two hundred twenty".