20678677417 has 4 divisors (see below), whose sum is σ = 21767028880. Its totient is φ = 19590325956.

The previous prime is 20678677403. The next prime is 20678677421. The reversal of 20678677417 is 71477687602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20678677417 - 2²³ = 20670288809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20678377417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544175703 + ... + 544175740.

It is an arithmetic number, because the mean of its divisors is an integer number (5441757220).

Almost surely, 2^20678677417 is an apocalyptic number.

It is an amenable number.

20678677417 is a deficient number, since it is larger than the sum of its proper divisors (1088351463).

20678677417 is a wasteful number, since it uses less digits than its factorization.

20678677417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088351462.

The product of its (nonzero) digits is 5531904, while the sum is 55.

The spelling of 20678677417 in words is "twenty billion, six hundred seventy-eight million, six hundred seventy-seven thousand, four hundred seventeen".