20291158 has 8 divisors (see below), whose sum is σ = 30457152. Its totient is φ = 10138776.

The previous prime is 20291147. The next prime is 20291177. The reversal of 20291158 is 85119202.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (3807144).

Almost surely, 2^20291158 is an apocalyptic number.

20291158 is a deficient number, since it is larger than the sum of its proper divisors (10165994).

20291158 is a wasteful number, since it uses less digits than its factorization.

20291158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 20291158 is about 4504.5707897645. The cubic root of 20291158 is about 272.7526282756.

It can be divided in two parts, 20291 and 158, that added together give a square (20449 = 143²).

The spelling of 20291158 in words is "twenty million, two hundred ninety-one thousand, one hundred fifty-eight".