21035342320 has 40 divisors (see below), whose sum is σ = 51481236240. Its totient is φ = 7971287040.

The previous prime is 21035342281. The next prime is 21035342327. The reversal of 21035342320 is 2324353012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035342327) 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, 6918001 + ... + 6921040.

It is an arithmetic number, because the mean of its divisors is an integer number (1287030906).

Almost surely, 2^21035342320 is an apocalyptic number.

21035342320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21035342320 is an abundant number, since it is smaller than the sum of its proper divisors (30445893920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21035342320 is a wasteful number, since it uses less digits than its factorization.

21035342320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13839073 (or 13839067 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21035342320 its reverse (2324353012), we get a palindrome (23359695332).

The spelling of 21035342320 in words is "twenty-one billion, thirty-five million, three hundred forty-two thousand, three hundred twenty".