20656514 has 4 divisors (see below), whose sum is σ = 30984774. Its totient is φ = 10328256.

The previous prime is 20656511. The next prime is 20656523. The reversal of 20656514 is 41565602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18207289 + 2449225 = 4267^2 + 1565^2 .

It is not an unprimeable number, because it can be changed into a prime (20656511) by changing a digit.

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 as a sum of consecutive naturals, namely, 5164127 + ... + 5164130.

Almost surely, 2^20656514 is an apocalyptic number.

20656514 is a deficient number, since it is larger than the sum of its proper divisors (10328260).

20656514 is a wasteful number, since it uses less digits than its factorization.

20656514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328259.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20656514 is about 4544.9437840308. The cubic root of 20656514 is about 274.3799318510.

The spelling of 20656514 in words is "twenty million, six hundred fifty-six thousand, five hundred fourteen".