21433403040 has 96 divisors (see below), whose sum is σ = 77160263040. Its totient is φ = 4899062784.

The previous prime is 21433403023. The next prime is 21433403071. The reversal of 21433403040 is 4030433412.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21433403040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186135 + ... + 3192854.

It is an arithmetic number, because the mean of its divisors is an integer number (803752740).

Almost surely, 2^21433403040 is an apocalyptic number.

21433403040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433403040 is an abundant number, since it is smaller than the sum of its proper divisors (55726860000).

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

21433403040 is a wasteful number, since it uses less digits than its factorization.

21433403040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379014 (or 6379006 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21433403040 its reverse (4030433412), we get a palindrome (25463836452).

The spelling of 21433403040 in words is "twenty-one billion, four hundred thirty-three million, four hundred three thousand, forty".