20801229 has 8 divisors (see below), whose sum is σ = 27756672. Its totient is φ = 13856640.

The previous prime is 20801191. The next prime is 20801243. The reversal of 20801229 is 92210802.

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

It is not a de Polignac number, because 20801229 - 2⁷ = 20801101 is a prime.

It is a super-2 number, since 2×20801229² = 865382255820882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20801199 and 20801208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801629) 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, 4509 + ... + 7869.

It is an arithmetic number, because the mean of its divisors is an integer number (3469584).

Almost surely, 2^20801229 is an apocalyptic number.

It is an amenable number.

20801229 is a deficient number, since it is larger than the sum of its proper divisors (6955443).

20801229 is a wasteful number, since it uses less digits than its factorization.

20801229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20801229 is about 4560.8364364445. The cubic root of 20801229 is about 275.0191898455.

The spelling of 20801229 in words is "twenty million, eight hundred one thousand, two hundred twenty-nine".