18958570677 has 6 divisors (see below), whose sum is σ = 27384602102. Its totient is φ = 12639047112.

The previous prime is 18958570649. The next prime is 18958570703. The reversal of 18958570677 is 77607585981.

18958570677 is a `hidden beast` number, since 1 + 8 + 9 + 58 + 570 + 6 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17157332196 + 1801238481 = 130986^2 + 42441^2 .

It is not a de Polignac number, because 18958570677 - 2¹² = 18958566581 is a prime.

It is a super-2 number, since 2×18958570677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18958570607) 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, 1053253918 + ... + 1053253935.

Almost surely, 2^18958570677 is an apocalyptic number.

It is an amenable number.

18958570677 is a deficient number, since it is larger than the sum of its proper divisors (8426031425).

18958570677 is a wasteful number, since it uses less digits than its factorization.

18958570677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106507859 (or 2106507856 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 63.

The spelling of 18958570677 in words is "eighteen billion, nine hundred fifty-eight million, five hundred seventy thousand, six hundred seventy-seven".