20042152 has 32 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 9155520.

The previous prime is 20042117. The next prime is 20042173. The reversal of 20042152 is 25124002.

It is a super-2 number, since 2×20042152² = 803375713582208, 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 7 ways as a sum of consecutive naturals, for example, 9777 + ... + 11647.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^20042152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20042152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20442240).

20042152 is an abundant number, since it is smaller than the sum of its proper divisors (20842328).

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

20042152 is a wasteful number, since it uses less digits than its factorization.

20042152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20042152 is about 4476.8462113412. The cubic root of 20042152 is about 271.6323247308.

Adding to 20042152 its reverse (25124002), we get a palindrome (45166154).

The spelling of 20042152 in words is "twenty million, forty-two thousand, one hundred fifty-two".