19880785711 has 16 divisors (see below), whose sum is σ = 21269521728. Its totient is φ = 18516672000.

The previous prime is 19880785709. The next prime is 19880785787. The reversal of 19880785711 is 11758708891.

It is not a de Polignac number, because 19880785711 - 2¹ = 19880785709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19880785511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3255561 + ... + 3261661.

It is an arithmetic number, because the mean of its divisors is an integer number (1329345108).

Almost surely, 2^19880785711 is an apocalyptic number.

19880785711 is a deficient number, since it is larger than the sum of its proper divisors (1388736017).

19880785711 is a wasteful number, since it uses less digits than its factorization.

19880785711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082.

The product of its (nonzero) digits is 1128960, while the sum is 55.

The spelling of 19880785711 in words is "nineteen billion, eight hundred eighty million, seven hundred eighty-five thousand, seven hundred eleven".