20073642 has 8 divisors (see below), whose sum is σ = 40147296. Its totient is φ = 6691212.

The previous prime is 20073637. The next prime is 20073661. The reversal of 20073642 is 24637002.

It is a sphenic number, since it is the product of 3 distinct primes.

20073642 is an admirable number.

It is a super-2 number, since 2×20073642² = 805902206288328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672798 + ... + 1672809.

It is an arithmetic number, because the mean of its divisors is an integer number (5018412).

Almost surely, 2^20073642 is an apocalyptic number.

20073642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20073642 is a wasteful number, since it uses less digits than its factorization.

20073642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345612.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20073642 is about 4480.3618157466. The cubic root of 20073642 is about 271.7745121564.

The spelling of 20073642 in words is "twenty million, seventy-three thousand, six hundred forty-two".