21300403240 has 32 divisors (see below), whose sum is σ = 47930369760. Its totient is φ = 8519368000.

The previous prime is 21300403213. The next prime is 21300403303. The reversal of 21300403240 is 4230400312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612315 + ... + 646165.

It is an arithmetic number, because the mean of its divisors is an integer number (1497824055).

Almost surely, 2^21300403240 is an apocalyptic number.

21300403240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300403240 is an abundant number, since it is smaller than the sum of its proper divisors (26629966520).

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

21300403240 is a wasteful number, since it uses less digits than its factorization.

21300403240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49593 (or 49589 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21300403240 its reverse (4230400312), we get a palindrome (25530803552).

The spelling of 21300403240 in words is "twenty-one billion, three hundred million, four hundred three thousand, two hundred forty".