19704051407 has 4 divisors (see below), whose sum is σ = 20038018440. Its totient is φ = 19370084376.

The previous prime is 19704051377. The next prime is 19704051427. The reversal of 19704051407 is 70415040791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19704051407 - 2¹⁸ = 19703789263 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 (19704051427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166983428 + ... + 166983545.

It is an arithmetic number, because the mean of its divisors is an integer number (5009504610).

Almost surely, 2^19704051407 is an apocalyptic number.

19704051407 is a deficient number, since it is larger than the sum of its proper divisors (333967033).

19704051407 is an equidigital number, since it uses as much as digits as its factorization.

19704051407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333967032.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 19704051407 in words is "nineteen billion, seven hundred four million, fifty-one thousand, four hundred seven".