20537229 has 8 divisors (see below), whose sum is σ = 28573632. Its totient is φ = 13096160.

The previous prime is 20537227. The next prime is 20537243. The reversal of 20537229 is 92273502.

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 20537229 - 2¹ = 20537227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20537196 and 20537205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20537227) 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, 148752 + ... + 148889.

It is an arithmetic number, because the mean of its divisors is an integer number (3571704).

Almost surely, 2^20537229 is an apocalyptic number.

It is an amenable number.

20537229 is a deficient number, since it is larger than the sum of its proper divisors (8036403).

20537229 is a wasteful number, since it uses less digits than its factorization.

20537229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297667.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20537229 is about 4531.8019594859. The cubic root of 20537229 is about 273.8507587643.

The spelling of 20537229 in words is "twenty million, five hundred thirty-seven thousand, two hundred twenty-nine".