19488680077 has 4 divisors (see below), whose sum is σ = 19489671136. Its totient is φ = 19487689020.

The previous prime is 19488680063. The next prime is 19488680093. The reversal of 19488680077 is 77008688491.

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 19488680077 - 2⁷ = 19488679949 is a prime.

It is a super-2 number, since 2×19488680077² (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 (19488680047) 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, 465423 + ... + 505564.

It is an arithmetic number, because the mean of its divisors is an integer number (4872417784).

Almost surely, 2^19488680077 is an apocalyptic number.

It is an amenable number.

19488680077 is a deficient number, since it is larger than the sum of its proper divisors (991059).

19488680077 is an equidigital number, since it uses as much as digits as its factorization.

19488680077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991058.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 19488680077 in words is "nineteen billion, four hundred eighty-eight million, six hundred eighty thousand, seventy-seven".