20681476 has 6 divisors (see below), whose sum is σ = 36192590. Its totient is φ = 10340736.

The previous prime is 20681471. The next prime is 20681477. The reversal of 20681476 is 67418602.

It can be written as a sum of positive squares in only one way, i.e., 17859076 + 2822400 = 4226^2 + 1680^2 .

It is not an unprimeable number, because it can be changed into a prime (20681471) 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, 2585181 + ... + 2585188.

Almost surely, 2^20681476 is an apocalyptic number.

It is an amenable number.

20681476 is a deficient number, since it is larger than the sum of its proper divisors (15511114).

20681476 is a wasteful number, since it uses less digits than its factorization.

20681476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5170373 (or 5170371 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20681476 is about 4547.6890834797. The cubic root of 20681476 is about 274.4904105572.

The spelling of 20681476 in words is "twenty million, six hundred eighty-one thousand, four hundred seventy-six".