19713261455 has 16 divisors (see below), whose sum is σ = 25658355744. Its totient is φ = 14480901120.

The previous prime is 19713261427. The next prime is 19713261479. The reversal of 19713261455 is 55416231791.

It is not a de Polignac number, because 19713261455 - 2¹⁶ = 19713195919 is a prime.

It is a super-2 number, since 2×19713261455² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2824817 + ... + 2831786.

It is an arithmetic number, because the mean of its divisors is an integer number (1603647234).

Almost surely, 2^19713261455 is an apocalyptic number.

19713261455 is a deficient number, since it is larger than the sum of its proper divisors (5945094289).

19713261455 is a wasteful number, since it uses less digits than its factorization.

19713261455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656666.

The product of its digits is 226800, while the sum is 44.

The spelling of 19713261455 in words is "nineteen billion, seven hundred thirteen million, two hundred sixty-one thousand, four hundred fifty-five".