21433002040 has 32 divisors (see below), whose sum is σ = 49250306880. Its totient is φ = 8390791552.

The previous prime is 21433002037. The next prime is 21433002043. The reversal of 21433002040 is 4020033412.

It is an interprime number because it is at equal distance from previous prime (21433002037) and next prime (21433002043).

It is a junction number, because it is equal to n+sod(n) for n = 21433001999 and 21433002017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433002043) 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, 5698387 + ... + 5702146.

It is an arithmetic number, because the mean of its divisors is an integer number (1539072090).

Almost surely, 2^21433002040 is an apocalyptic number.

21433002040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433002040 is an abundant number, since it is smaller than the sum of its proper divisors (27817304840).

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

21433002040 is a wasteful number, since it uses less digits than its factorization.

21433002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11400591 (or 11400587 counting only the distinct ones).

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

Adding to 21433002040 its reverse (4020033412), we get a palindrome (25453035452).

The spelling of 21433002040 in words is "twenty-one billion, four hundred thirty-three million, two thousand, forty".