21332503240 has 48 divisors (see below), whose sum is σ = 49710391380. Its totient is φ = 8238746880.

The previous prime is 21332503229. The next prime is 21332503249. The reversal of 21332503240 is 4230523312.

It can be written as a sum of positive squares in 6 ways, for example, as 16481937924 + 4850565316 = 128382^2 + 69646^2 .

It is a super-2 number, since 2×21332503240² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21332503249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283431 + ... + 350710.

Almost surely, 2^21332503240 is an apocalyptic number.

21332503240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332503240 is an abundant number, since it is smaller than the sum of its proper divisors (28377888140).

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

21332503240 is a wasteful number, since it uses less digits than its factorization.

21332503240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634210 (or 634177 counting only the distinct ones).

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

The spelling of 21332503240 in words is "twenty-one billion, three hundred thirty-two million, five hundred three thousand, two hundred forty".