19364058921 has 4 divisors (see below), whose sum is σ = 25818745232. Its totient is φ = 12909372612.

The previous prime is 19364058919. The next prime is 19364058949. The reversal of 19364058921 is 12985046391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19364058921 - 2¹ = 19364058919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19364051921) 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, 3227343151 + ... + 3227343156.

It is an arithmetic number, because the mean of its divisors is an integer number (6454686308).

Almost surely, 2^19364058921 is an apocalyptic number.

It is an amenable number.

19364058921 is a deficient number, since it is larger than the sum of its proper divisors (6454686311).

19364058921 is an equidigital number, since it uses as much as digits as its factorization.

19364058921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454686310.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 19364058921 in words is "nineteen billion, three hundred sixty-four million, fifty-eight thousand, nine hundred twenty-one".