19487261043 has 16 divisors (see below), whose sum is σ = 28872560640. Its totient is φ = 12990362472.

The previous prime is 19487261039. The next prime is 19487261093. The reversal of 19487261043 is 34016278491.

It is not a de Polignac number, because 19487261043 - 2² = 19487261039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19487261043.

It is not an unprimeable number, because it can be changed into a prime (19487261033) 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, 374730 + ... + 423552.

It is an arithmetic number, because the mean of its divisors is an integer number (1804535040).

Almost surely, 2^19487261043 is an apocalyptic number.

19487261043 is a deficient number, since it is larger than the sum of its proper divisors (9385299597).

19487261043 is a wasteful number, since it uses less digits than its factorization.

19487261043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63615 (or 63609 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 19487261043 in words is "nineteen billion, four hundred eighty-seven million, two hundred sixty-one thousand, forty-three".