21300411440 has 80 divisors (see below), whose sum is σ = 61743548160. Its totient is φ = 6639087360.

The previous prime is 21300411439. The next prime is 21300411467. The reversal of 21300411440 is 4411400312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1722770 + ... + 1735089.

It is an arithmetic number, because the mean of its divisors is an integer number (771794352).

Almost surely, 2^21300411440 is an apocalyptic number.

21300411440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300411440 is an abundant number, since it is smaller than the sum of its proper divisors (40443136720).

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

21300411440 is a wasteful number, since it uses less digits than its factorization.

21300411440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457890 (or 3457884 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21300411440 its reverse (4411400312), we get a palindrome (25711811752).

The spelling of 21300411440 in words is "twenty-one billion, three hundred million, four hundred eleven thousand, four hundred forty".