21371907219 has 8 divisors (see below), whose sum is σ = 30687866832. Its totient is φ = 13151942880.

The previous prime is 21371907203. The next prime is 21371907229. The reversal of 21371907219 is 91270917312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21371907219 - 2⁴ = 21371907203 is a prime.

It is a super-2 number, since 2×21371907219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21371907229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273998772 + ... + 273998849.

It is an arithmetic number, because the mean of its divisors is an integer number (3835983354).

Almost surely, 2^21371907219 is an apocalyptic number.

21371907219 is a deficient number, since it is larger than the sum of its proper divisors (9315959613).

21371907219 is a wasteful number, since it uses less digits than its factorization.

21371907219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547997637.

The product of its (nonzero) digits is 47628, while the sum is 42.

The spelling of 21371907219 in words is "twenty-one billion, three hundred seventy-one million, nine hundred seven thousand, two hundred nineteen".