19862110489 has 27 divisors (see below), whose sum is σ = 22180185783. Its totient is φ = 17777852352.

The previous prime is 19862110487. The next prime is 19862110511. The reversal of 19862110489 is 98401126891.

The square root of 19862110489 is 140933.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 566678025 + 19295432464 = 23805^2 + 138908^2 .

It is not a de Polignac number, because 19862110489 - 2¹ = 19862110487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19862110487) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 67788627 + ... + 67788919.

Almost surely, 2^19862110489 is an apocalyptic number.

19862110489 is the 140933-rd square number.

19862110489 is the 70467-th centered octagonal number.

It is an amenable number.

19862110489 is a deficient number, since it is larger than the sum of its proper divisors (2318075294).

19862110489 is an frugal number, since it uses more digits than its factorization.

19862110489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

Multiplying 19862110489 by its sum of digits (49), we get a square (973243413961 = 986531²).

The spelling of 19862110489 in words is "nineteen billion, eight hundred sixty-two million, one hundred ten thousand, four hundred eighty-nine".