20013020 has 12 divisors (see below), whose sum is σ = 42027384. Its totient is φ = 8005200.

The previous prime is 20012999. The next prime is 20013031. The reversal of 20013020 is 2031002.

It is a junction number, because it is equal to n+sod(n) for n = 20012989 and 20013007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500306 + ... + 500345.

It is an arithmetic number, because the mean of its divisors is an integer number (3502282).

Almost surely, 2^20013020 is an apocalyptic number.

20013020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013020 is an abundant number, since it is smaller than the sum of its proper divisors (22014364).

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

20013020 is a wasteful number, since it uses less digits than its factorization.

20013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000660 (or 1000658 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 20013020 is about 4473.5913984181. The cubic root of 20013020 is about 271.5006517445.

Adding to 20013020 its reverse (2031002), we get a palindrome (22044022).

The spelling of 20013020 in words is "twenty million, thirteen thousand, twenty".