21303541240 has 32 divisors (see below), whose sum is σ = 47964577680. Its totient is φ = 8515796992.

The previous prime is 21303541223. The next prime is 21303541243. The reversal of 21303541240 is 4214530312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303541243) 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, 113929 + ... + 235768.

Almost surely, 2^21303541240 is an apocalyptic number.

21303541240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303541240 is an abundant number, since it is smaller than the sum of its proper divisors (26661036440).

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

21303541240 is a wasteful number, since it uses less digits than its factorization.

21303541240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351231 (or 351227 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 21303541240 in words is "twenty-one billion, three hundred three million, five hundred forty-one thousand, two hundred forty".