20412791 has 8 divisors (see below), whose sum is σ = 23769504. Its totient is φ = 17166240.

The previous prime is 20412727. The next prime is 20412797. The reversal of 20412791 is 19721402.

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

It is not a de Polignac number, because 20412791 - 2⁶ = 20412727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20412791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412797) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 27140 + ... + 27881.

It is an arithmetic number, because the mean of its divisors is an integer number (2971188).

Almost surely, 2^20412791 is an apocalyptic number.

20412791 is a deficient number, since it is larger than the sum of its proper divisors (3356713).

20412791 is an equidigital number, since it uses as much as digits as its factorization.

20412791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55081.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20412791 is about 4518.0516818647. The cubic root of 20412791 is about 273.2965376141.

The spelling of 20412791 in words is "twenty million, four hundred twelve thousand, seven hundred ninety-one".