20420032020 has 24 divisors (see below), whose sum is σ = 57176089824. Its totient is φ = 5445341856.

The previous prime is 20420031953. The next prime is 20420032021. The reversal of 20420032020 is 2023002402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420032021) 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, 170166874 + ... + 170166993.

It is an arithmetic number, because the mean of its divisors is an integer number (2382337076).

Almost surely, 2^20420032020 is an apocalyptic number.

20420032020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420032020 is an abundant number, since it is smaller than the sum of its proper divisors (36756057804).

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

20420032020 is a wasteful number, since it uses less digits than its factorization.

20420032020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340333879 (or 340333877 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20420032020 its reverse (2023002402), we get a palindrome (22443034422).

The spelling of 20420032020 in words is "twenty billion, four hundred twenty million, thirty-two thousand, twenty".