20551269 has 8 divisors (see below), whose sum is σ = 27462240. Its totient is φ = 13670576.

The previous prime is 20551253. The next prime is 20551277. The reversal of 20551269 is 96215502.

It is a happy number.

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 20551269 - 2⁴ = 20551253 is a prime.

It is a super-2 number, since 2×20551269² = 844709315020722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551229) 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, 5934 + ... + 8735.

It is an arithmetic number, because the mean of its divisors is an integer number (3432780).

Almost surely, 2^20551269 is an apocalyptic number.

It is an amenable number.

20551269 is a deficient number, since it is larger than the sum of its proper divisors (6910971).

20551269 is a wasteful number, since it uses less digits than its factorization.

20551269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15139.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 20551269 is about 4533.3507475156. The cubic root of 20551269 is about 273.9131493432.

The spelling of 20551269 in words is "twenty million, five hundred fifty-one thousand, two hundred sixty-nine".