20953229 has 8 divisors (see below), whose sum is σ = 22952160. Its totient is φ = 18970000.

The previous prime is 20953223. The next prime is 20953243. The reversal of 20953229 is 92235902.

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 20953229 - 2²⁴ = 4176013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20953195 and 20953204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953223) 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, 1034 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (2869020).

Almost surely, 2^20953229 is an apocalyptic number.

It is an amenable number.

20953229 is a deficient number, since it is larger than the sum of its proper divisors (1998931).

20953229 is a wasteful number, since it uses less digits than its factorization.

20953229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20953229 is about 4577.4697159020. The cubic root of 20953229 is about 275.6874437357.

The spelling of 20953229 in words is "twenty million, nine hundred fifty-three thousand, two hundred twenty-nine".