20042056 has 16 divisors (see below), whose sum is σ = 38288700. Its totient is φ = 9831744.

The previous prime is 20042053. The next prime is 20042059. The reversal of 20042056 is 65024002.

It is an interprime number because it is at equal distance from previous prime (20042053) and next prime (20042059).

It can be written as a sum of positive squares in 2 ways, for example, as 19061956 + 980100 = 4366^2 + 990^2 .

It is not an unprimeable number, because it can be changed into a prime (20042051) 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, 23211 + ... + 24058.

Almost surely, 2^20042056 is an apocalyptic number.

It is an amenable number.

20042056 is a deficient number, since it is larger than the sum of its proper divisors (18246644).

20042056 is a wasteful number, since it uses less digits than its factorization.

20042056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47328 (or 47324 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20042056 is about 4476.8354894948. The cubic root of 20042056 is about 271.6318910325.

Adding to 20042056 its reverse (65024002), we get a palindrome (85066058).

The spelling of 20042056 in words is "twenty million, forty-two thousand, fifty-six".