20066442 has 32 divisors (see below), whose sum is σ = 45688320. Its totient is φ = 5815920.

The previous prime is 20066429. The next prime is 20066447. The reversal of 20066442 is 24466002.

It is not an unprimeable number, because it can be changed into a prime (20066447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5092 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (1427760).

Almost surely, 2^20066442 is an apocalyptic number.

20066442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20066442 is an abundant number, since it is smaller than the sum of its proper divisors (25621878).

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

20066442 is a wasteful number, since it uses less digits than its factorization.

20066442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13258.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20066442 is about 4479.5582371479. The cubic root of 20066442 is about 271.7420149728.

It can be divided in two parts, 2006 and 6442, that added together give a palindrome (8448).

The spelling of 20066442 in words is "twenty million, sixty-six thousand, four hundred forty-two".