20875142 has 4 divisors (see below), whose sum is σ = 31312716. Its totient is φ = 10437570.

The previous prime is 20875139. The next prime is 20875181. The reversal of 20875142 is 24157802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5218784 + ... + 5218787.

It is an arithmetic number, because the mean of its divisors is an integer number (7828179).

Almost surely, 2^20875142 is an apocalyptic number.

20875142 is a deficient number, since it is larger than the sum of its proper divisors (10437574).

20875142 is a wasteful number, since it uses less digits than its factorization.

20875142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437573.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 20875142 is about 4568.9322603864. The cubic root of 20875142 is about 275.3445466507.

The spelling of 20875142 in words is "twenty million, eight hundred seventy-five thousand, one hundred forty-two".