20443242 has 8 divisors (see below), whose sum is σ = 40886496. Its totient is φ = 6814412.

The previous prime is 20443201. The next prime is 20443249. The reversal of 20443242 is 24234402.

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

20443242 is an admirable number.

It is a super-2 number, since 2×20443242² = 835852286941128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20443249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703598 + ... + 1703609.

It is an arithmetic number, because the mean of its divisors is an integer number (5110812).

Almost surely, 2^20443242 is an apocalyptic number.

20443242 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.

20443242 is a wasteful number, since it uses less digits than its factorization.

20443242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407212.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20443242 is about 4521.4203520575. The cubic root of 20443242 is about 273.4323677752.

Adding to 20443242 its reverse (24234402), we get a palindrome (44677644).

The spelling of 20443242 in words is "twenty million, four hundred forty-three thousand, two hundred forty-two".