21433341040 has 40 divisors (see below), whose sum is σ = 49973752368. Its totient is φ = 8549038080.

The previous prime is 21433341031. The next prime is 21433341049. The reversal of 21433341040 is 4014333412.

It is an interprime number because it is at equal distance from previous prime (21433341031) and next prime (21433341049).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 21433340996 and 21433341014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433341049) 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, 351246 + ... + 407725.

Almost surely, 2^21433341040 is an apocalyptic number.

21433341040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433341040 is an abundant number, since it is smaller than the sum of its proper divisors (28540411328).

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

21433341040 is a wasteful number, since it uses less digits than its factorization.

21433341040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759337 (or 759331 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21433341040 its reverse (4014333412), we get a palindrome (25447674452).

The spelling of 21433341040 in words is "twenty-one billion, four hundred thirty-three million, three hundred forty-one thousand, forty".