20680754 has 8 divisors (see below), whose sum is σ = 31446300. Its totient is φ = 10198656.

The previous prime is 20680747. The next prime is 20680787. The reversal of 20680754 is 45708602.

It can be written as a sum of positive squares in 2 ways, for example, as 18361225 + 2319529 = 4285^2 + 1523^2 .

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 20680754.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70679 + ... + 70970.

Almost surely, 2^20680754 is an apocalyptic number.

20680754 is a deficient number, since it is larger than the sum of its proper divisors (10765546).

20680754 is a wasteful number, since it uses less digits than its factorization.

20680754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141724.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20680754 is about 4547.6097018104. The cubic root of 20680754 is about 274.4872163239.

The spelling of 20680754 in words is "twenty million, six hundred eighty thousand, seven hundred fifty-four".