20442558 has 8 divisors (see below), whose sum is σ = 40885128. Its totient is φ = 6814184.

The previous prime is 20442557. The next prime is 20442581. The reversal of 20442558 is 85524402.

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

20442558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442557) 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, 1703541 + ... + 1703552.

It is an arithmetic number, because the mean of its divisors is an integer number (5110641).

Almost surely, 2^20442558 is an apocalyptic number.

20442558 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.

20442558 is a wasteful number, since it uses less digits than its factorization.

20442558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407098.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 20442558 is about 4521.3447114769. The cubic root of 20442558 is about 273.4293181965.

The spelling of 20442558 in words is "twenty million, four hundred forty-two thousand, five hundred fifty-eight".