19758946413 has 16 divisors (see below), whose sum is σ = 26418200000. Its totient is φ = 13136204160.

The previous prime is 19758946411. The next prime is 19758946447. The reversal of 19758946413 is 31464985791.

It is a happy number.

It is not a de Polignac number, because 19758946413 - 2¹ = 19758946411 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 (19758946411) 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, 2314593 + ... + 2323113.

It is an arithmetic number, because the mean of its divisors is an integer number (1651137500).

Almost surely, 2^19758946413 is an apocalyptic number.

It is an amenable number.

19758946413 is a deficient number, since it is larger than the sum of its proper divisors (6659253587).

19758946413 is a wasteful number, since it uses less digits than its factorization.

19758946413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572.

The product of its digits is 6531840, while the sum is 57.

The spelling of 19758946413 in words is "nineteen billion, seven hundred fifty-eight million, nine hundred forty-six thousand, four hundred thirteen".