20291107 has 8 divisors (see below), whose sum is σ = 21429200. Its totient is φ = 19160064.

The previous prime is 20291087. The next prime is 20291119. The reversal of 20291107 is 70119202.

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

It is a cyclic number.

It is not a de Polignac number, because 20291107 - 2¹⁹ = 19766819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20291137) 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 7 ways as a sum of consecutive naturals, for example, 4819 + ... + 7987.

It is an arithmetic number, because the mean of its divisors is an integer number (2678650).

Almost surely, 2^20291107 is an apocalyptic number.

20291107 is a deficient number, since it is larger than the sum of its proper divisors (1138093).

20291107 is a wasteful number, since it uses less digits than its factorization.

20291107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 20291107 is about 4504.5651288443. The cubic root of 20291107 is about 272.7523997624.

It can be divided in two parts, 2029 and 1107, that added together give a square (3136 = 56²).

The spelling of 20291107 in words is "twenty million, two hundred ninety-one thousand, one hundred seven".