20702617047 has 12 divisors (see below), whose sum is σ = 34175748880. Its totient is φ = 11830066848.

The previous prime is 20702617031. The next prime is 20702617057. The reversal of 20702617047 is 74071620702.

It is a happy number.

It is not a de Polignac number, because 20702617047 - 2⁴ = 20702617031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702617007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164306422 + ... + 164306547.

Almost surely, 2^20702617047 is an apocalyptic number.

20702617047 is a deficient number, since it is larger than the sum of its proper divisors (13473131833).

20702617047 is a wasteful number, since it uses less digits than its factorization.

20702617047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328612982 (or 328612979 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 20702617047 in words is "twenty billion, seven hundred two million, six hundred seventeen thousand, forty-seven".