21302332040 has 32 divisors (see below), whose sum is σ = 52287543360. Its totient is φ = 7746302400.

The previous prime is 21302332033. The next prime is 21302332043. The reversal of 21302332040 is 4023320312.

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

It is not an unprimeable number, because it can be changed into a prime (21302332043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24206756 + ... + 24207635.

It is an arithmetic number, because the mean of its divisors is an integer number (1633985730).

Almost surely, 2^21302332040 is an apocalyptic number.

21302332040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302332040 is an abundant number, since it is smaller than the sum of its proper divisors (30985211320).

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

21302332040 is a wasteful number, since it uses less digits than its factorization.

21302332040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48414413 (or 48414409 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21302332040 its reverse (4023320312), we get a palindrome (25325652352).

The spelling of 21302332040 in words is "twenty-one billion, three hundred two million, three hundred thirty-two thousand, forty".