20663274 has 16 divisors (see below), whose sum is σ = 41383008. Its totient is φ = 6878352.

The previous prime is 20663273. The next prime is 20663309. The reversal of 20663274 is 47236602.

It is not an unprimeable number, because it can be changed into a prime (20663273) 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, 3544 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (2586438).

Almost surely, 2^20663274 is an apocalyptic number.

20663274 is an abundant number, since it is smaller than the sum of its proper divisors (20719734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20663274 is a wasteful number, since it uses less digits than its factorization.

20663274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 20663274 is about 4545.6874067626. The cubic root of 20663274 is about 274.4098595539.

Adding to 20663274 its reverse (47236602), we get a palindrome (67899876).

The spelling of 20663274 in words is "twenty million, six hundred sixty-three thousand, two hundred seventy-four".