20766254 has 8 divisors (see below), whose sum is σ = 31909248. Its totient is φ = 10129840.

The previous prime is 20766253. The next prime is 20766269. The reversal of 20766254 is 45266702.

20766254 = 2277² + 2278² + ... + 2280².

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

It is a self number, because there is not a number n which added to its sum of digits gives 20766254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766253) 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, 126542 + ... + 126705.

It is an arithmetic number, because the mean of its divisors is an integer number (3988656).

Almost surely, 2^20766254 is an apocalyptic number.

20766254 is a deficient number, since it is larger than the sum of its proper divisors (11142994).

20766254 is a wasteful number, since it uses less digits than its factorization.

20766254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253290.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20766254 is about 4557.0005486065. Note that the first 3 decimals coincide. The cubic root of 20766254 is about 274.8649651088.

The spelling of 20766254 in words is "twenty million, seven hundred sixty-six thousand, two hundred fifty-four".