20712158 has 8 divisors (see below), whose sum is σ = 31087560. Its totient is φ = 10349640.

The previous prime is 20712151. The next prime is 20712163. The reversal of 20712158 is 85121702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20712151) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4553 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (3885945).

Almost surely, 2^20712158 is an apocalyptic number.

20712158 is a deficient number, since it is larger than the sum of its proper divisors (10375402).

20712158 is a wasteful number, since it uses less digits than its factorization.

20712158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 20712158 is about 4551.0611949303. The cubic root of 20712158 is about 274.6260835532.

The spelling of 20712158 in words is "twenty million, seven hundred twelve thousand, one hundred fifty-eight".