20013066 has 24 divisors (see below), whose sum is σ = 43771104. Its totient is φ = 6608040.

The previous prime is 20013053. The next prime is 20013067. The reversal of 20013066 is 66031002.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20013067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3270 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (1823796).

Almost surely, 2^20013066 is an apocalyptic number.

20013066 is an abundant number, since it is smaller than the sum of its proper divisors (23758038).

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

20013066 is a wasteful number, since it uses less digits than its factorization.

20013066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506 (or 10503 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20013066 is about 4473.5965396982. The cubic root of 20013066 is about 271.5008597594.

Adding to 20013066 its reverse (66031002), we get a palindrome (86044068).

The spelling of 20013066 in words is "twenty million, thirteen thousand, sixty-six".