20006020 has 24 divisors (see below), whose sum is σ = 42908544. Its totient is φ = 7831776.

The previous prime is 20006003. The next prime is 20006023. The reversal of 20006020 is 2060002.

It is a happy number.

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 = 20005988 and 20006006.

It is not an unprimeable number, because it can be changed into a prime (20006023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9702 + ... + 11581.

It is an arithmetic number, because the mean of its divisors is an integer number (1787856).

Almost surely, 2^20006020 is an apocalyptic number.

20006020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20006020 is an abundant number, since it is smaller than the sum of its proper divisors (22902524).

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

20006020 is a wasteful number, since it uses less digits than its factorization.

20006020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21339 (or 21337 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20006020 is about 4472.8089608209. The cubic root of 20006020 is about 271.4689935842.

Adding to 20006020 its reverse (2060002), we get a palindrome (22066022).

The spelling of 20006020 in words is "twenty million, six thousand, twenty".