21433506430 has 32 divisors (see below), whose sum is σ = 44839111680. Its totient is φ = 7224076320.

The previous prime is 21433506359. The next prime is 21433506433. The reversal of 21433506430 is 3460533412.

It is a junction number, because it is equal to n+sod(n) for n = 21433506392 and 21433506401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433506433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2590726 + ... + 2598985.

It is an arithmetic number, because the mean of its divisors is an integer number (1401222240).

Almost surely, 2^21433506430 is an apocalyptic number.

21433506430 is an abundant number, since it is smaller than the sum of its proper divisors (23405605250).

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

21433506430 is a wasteful number, since it uses less digits than its factorization.

21433506430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189784.

The product of its (nonzero) digits is 25920, while the sum is 31.

The spelling of 21433506430 in words is "twenty-one billion, four hundred thirty-three million, five hundred six thousand, four hundred thirty".