20678568547 has 96 divisors (see below), whose sum is σ = 28502134080. Its totient is φ = 14814213120.

The previous prime is 20678568497. The next prime is 20678568557. The reversal of 20678568547 is 74586587602.

It is a happy number.

It is not a de Polignac number, because 20678568547 - 2⁷ = 20678568419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20678568491 and 20678568500.

It is not an unprimeable number, because it can be changed into a prime (20678568557) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27316093 + ... + 27316849.

It is an arithmetic number, because the mean of its divisors is an integer number (296897230).

Almost surely, 2^20678568547 is an apocalyptic number.

20678568547 is a deficient number, since it is larger than the sum of its proper divisors (7823565533).

20678568547 is a wasteful number, since it uses less digits than its factorization.

20678568547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 20678568547 in words is "twenty billion, six hundred seventy-eight million, five hundred sixty-eight thousand, five hundred forty-seven".