20301131220 has 48 divisors (see below), whose sum is σ = 57183573888. Its totient is φ = 5381215360.

The previous prime is 20301131209. The next prime is 20301131237. The reversal of 20301131220 is 2213110302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20301131220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003011 + ... + 1023050.

It is an arithmetic number, because the mean of its divisors is an integer number (1191324456).

Almost surely, 2^20301131220 is an apocalyptic number.

20301131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20301131220 is an abundant number, since it is smaller than the sum of its proper divisors (36882442668).

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

20301131220 is a wasteful number, since it uses less digits than its factorization.

20301131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026240 (or 2026238 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20301131220 its reverse (2213110302), we get a palindrome (22514241522).

The spelling of 20301131220 in words is "twenty billion, three hundred one million, one hundred thirty-one thousand, two hundred twenty".