20021020120 has 32 divisors (see below), whose sum is σ = 45307699920. Its totient is φ = 7962113920.

The previous prime is 20021020111. The next prime is 20021020147. The reversal of 20021020120 is 2102012002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20021020097 and 20021020106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439686 + ... + 1453525.

Almost surely, 2^20021020120 is an apocalyptic number.

20021020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021020120 is an abundant number, since it is smaller than the sum of its proper divisors (25286679800).

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

20021020120 is a wasteful number, since it uses less digits than its factorization.

20021020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893395 (or 2893391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20021020120 its reverse (2102012002), we get a palindrome (22123032122).

The spelling of 20021020120 in words is "twenty billion, twenty-one million, twenty thousand, one hundred twenty".