20768242 has 16 divisors (see below), whose sum is σ = 34128864. Its totient is φ = 9400000.

The previous prime is 20768207. The next prime is 20768249. The reversal of 20768242 is 24286702.

It is not an unprimeable number, because it can be changed into a prime (20768249) 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, 3642 + ... + 7402.

It is an arithmetic number, because the mean of its divisors is an integer number (2133054).

Almost surely, 2^20768242 is an apocalyptic number.

20768242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20768242 is a deficient number, since it is larger than the sum of its proper divisors (13360622).

20768242 is a wasteful number, since it uses less digits than its factorization.

20768242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20768242 is about 4557.2186693201. The cubic root of 20768242 is about 274.8737359752.

The spelling of 20768242 in words is "twenty million, seven hundred sixty-eight thousand, two hundred forty-two".