20442356 has 24 divisors (see below), whose sum is σ = 39527040. Its totient is φ = 9172800.

The previous prime is 20442349. The next prime is 20442397. The reversal of 20442356 is 65324402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (1646960).

Almost surely, 2^20442356 is an apocalyptic number.

It is an amenable number.

20442356 is a deficient number, since it is larger than the sum of its proper divisors (19084684).

20442356 is a wasteful number, since it uses less digits than its factorization.

20442356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975 (or 5973 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20442356 is about 4521.3223729347. The cubic root of 20442356 is about 273.4284175770.

Adding to 20442356 its reverse (65324402), we get a palindrome (85766758).

The spelling of 20442356 in words is "twenty million, four hundred forty-two thousand, three hundred fifty-six".