20467229 has 4 divisors (see below), whose sum is σ = 20747676. Its totient is φ = 20186784.

The previous prime is 20467189. The next prime is 20467247. The reversal of 20467229 is 92276402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9424900 + 11042329 = 3070^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 20467229 - 2⁸ = 20466973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20467195 and 20467204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20467259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140114 + ... + 140259.

It is an arithmetic number, because the mean of its divisors is an integer number (5186919).

Almost surely, 2^20467229 is an apocalyptic number.

It is an amenable number.

20467229 is a deficient number, since it is larger than the sum of its proper divisors (280447).

20467229 is an equidigital number, since it uses as much as digits as its factorization.

20467229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280446.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20467229 is about 4524.0721700698. The cubic root of 20467229 is about 273.5392695837.

The spelling of 20467229 in words is "twenty million, four hundred sixty-seven thousand, two hundred twenty-nine".