20335120020 has 72 divisors (see below), whose sum is σ = 61893880776. Its totient is φ = 5404177152.

The previous prime is 20335119967. The next prime is 20335120031. The reversal of 20335120020 is 2002153302.

It can be written as a sum of positive squares in 4 ways, for example, as 4340964996 + 15994155024 = 65886^2 + 126468^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20335119975 and 20335120002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140047 + ... + 245526.

It is an arithmetic number, because the mean of its divisors is an integer number (859637233).

Almost surely, 2^20335120020 is an apocalyptic number.

20335120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20335120020 is an abundant number, since it is smaller than the sum of its proper divisors (41558760756).

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

20335120020 is a wasteful number, since it uses less digits than its factorization.

20335120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385881 (or 385876 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20335120020 its reverse (2002153302), we get a palindrome (22337273322).

The spelling of 20335120020 in words is "twenty billion, three hundred thirty-five million, one hundred twenty thousand, twenty".