20291269 has 8 divisors (see below), whose sum is σ = 20845440. Its totient is φ = 19740000.

The previous prime is 20291233. The next prime is 20291273. The reversal of 20291269 is 96219202.

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 20291269 - 2¹³ = 20283077 is a prime.

It is a super-2 number, since 2×20291269² = 823471195260722, which contains 22 as substring.

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 20291269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20291969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26644 + ... + 27394.

It is an arithmetic number, because the mean of its divisors is an integer number (2605680).

Almost surely, 2^20291269 is an apocalyptic number.

It is an amenable number.

20291269 is a deficient number, since it is larger than the sum of its proper divisors (554171).

20291269 is an equidigital number, since it uses as much as digits as its factorization.

20291269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20291269 is about 4504.5831105664. The cubic root of 20291269 is about 272.7531256267.

The spelling of 20291269 in words is "twenty million, two hundred ninety-one thousand, two hundred sixty-nine".