20706142 has 8 divisors (see below), whose sum is σ = 31134600. Its totient is φ = 10327944.

The previous prime is 20706131. The next prime is 20706151. The reversal of 20706142 is 24160702.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11517 + ... + 13192.

It is an arithmetic number, because the mean of its divisors is an integer number (3891825).

Almost surely, 2^20706142 is an apocalyptic number.

20706142 is a deficient number, since it is larger than the sum of its proper divisors (10428458).

20706142 is a wasteful number, since it uses less digits than its factorization.

20706142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25130.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20706142 is about 4550.4002021800. The cubic root of 20706142 is about 274.5994919171.

Adding to 20706142 its reverse (24160702), we get a palindrome (44866844).

The spelling of 20706142 in words is "twenty million, seven hundred six thousand, one hundred forty-two".