21303023040 has 168 divisors, whose sum is σ = 78910086528. Its totient is φ = 5243811840.

The previous prime is 21303022999. The next prime is 21303023047. The reversal of 21303023040 is 4032030312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303023047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247056 + ... + 321935.

It is an arithmetic number, because the mean of its divisors is an integer number (469702896).

Almost surely, 2^21303023040 is an apocalyptic number.

21303023040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303023040 is an abundant number, since it is smaller than the sum of its proper divisors (57607063488).

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

21303023040 is a wasteful number, since it uses less digits than its factorization.

21303023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569027 (or 569014 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21303023040 its reverse (4032030312), we get a palindrome (25335053352).

The spelling of 21303023040 in words is "twenty-one billion, three hundred three million, twenty-three thousand, forty".