21020332319 has 8 divisors (see below), whose sum is σ = 24176252448. Its totient is φ = 17902666080.

The previous prime is 21020332309. The next prime is 21020332331. The reversal of 21020332319 is 91323302012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020332319 is a prime.

It is a super-2 number, since 2×21020332319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020332309) 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, 9562292 + ... + 9564489.

It is an arithmetic number, because the mean of its divisors is an integer number (3022031556).

Almost surely, 2^21020332319 is an apocalyptic number.

21020332319 is a deficient number, since it is larger than the sum of its proper divisors (3155920129).

21020332319 is a wasteful number, since it uses less digits than its factorization.

21020332319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19126945.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 21020332319 in words is "twenty-one billion, twenty million, three hundred thirty-two thousand, three hundred nineteen".