20798668147 has 8 divisors (see below), whose sum is σ = 20870512400. Its totient is φ = 20726858880.

The previous prime is 20798668127. The next prime is 20798668159. The reversal of 20798668147 is 74186689702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20798668147 - 2⁷ = 20798668019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20798668091 and 20798668100.

It is not an unprimeable number, because it can be changed into a prime (20798668127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1835104 + ... + 1846402.

It is an arithmetic number, because the mean of its divisors is an integer number (2608814050).

Almost surely, 2^20798668147 is an apocalyptic number.

20798668147 is a deficient number, since it is larger than the sum of its proper divisors (71844253).

20798668147 is a wasteful number, since it uses less digits than its factorization.

20798668147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17493.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 20798668147 in words is "twenty billion, seven hundred ninety-eight million, six hundred sixty-eight thousand, one hundred forty-seven".