20679768 has 24 divisors (see below), whose sum is σ = 56007900. Its totient is φ = 6893232.

The previous prime is 20679767. The next prime is 20679779. The reversal of 20679768 is 86797602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143538 + ... + 143681.

Almost surely, 2^20679768 is an apocalyptic number.

It is an amenable number.

20679768 is an abundant number, since it is smaller than the sum of its proper divisors (35328132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20679768 is a wasteful number, since it uses less digits than its factorization.

20679768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287231 (or 287224 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 20679768 is about 4547.5012919185. The cubic root of 20679768 is about 274.4828539959.

The spelling of 20679768 in words is "twenty million, six hundred seventy-nine thousand, seven hundred sixty-eight".