21389357319 has 8 divisors (see below), whose sum is σ = 31111792512. Its totient is φ = 12963246840.

The previous prime is 21389357309. The next prime is 21389357333. The reversal of 21389357319 is 91375398312.

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

It is not a de Polignac number, because 21389357319 - 2³¹ = 19241873671 is a prime.

It is a super-2 number, since 2×21389357319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21389357309) 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, 324081139 + ... + 324081204.

It is an arithmetic number, because the mean of its divisors is an integer number (3888974064).

Almost surely, 2^21389357319 is an apocalyptic number.

21389357319 is a deficient number, since it is larger than the sum of its proper divisors (9722435193).

21389357319 is a wasteful number, since it uses less digits than its factorization.

21389357319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648162357.

The product of its digits is 1224720, while the sum is 51.

The spelling of 21389357319 in words is "twenty-one billion, three hundred eighty-nine million, three hundred fifty-seven thousand, three hundred nineteen".