20693768 has 8 divisors (see below), whose sum is σ = 38800830. Its totient is φ = 10346880.

The previous prime is 20693749. The next prime is 20693819. The reversal of 20693768 is 86739602.

It can be written as a sum of positive squares in only one way, i.e., 15038884 + 5654884 = 3878^2 + 2378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1293353 + ... + 1293368.

Almost surely, 2^20693768 is an apocalyptic number.

It is an amenable number.

20693768 is a deficient number, since it is larger than the sum of its proper divisors (18107062).

20693768 is a wasteful number, since it uses less digits than its factorization.

20693768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586727 (or 2586723 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20693768 is about 4549.0403383571. The cubic root of 20693768 is about 274.5447807562.

The spelling of 20693768 in words is "twenty million, six hundred ninety-three thousand, seven hundred sixty-eight".