21433430112 has 48 divisors (see below), whose sum is σ = 56463048432. Its totient is φ = 7119042560.

The previous prime is 21433430077. The next prime is 21433430159. The reversal of 21433430112 is 21103433412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370293 + ... + 424244.

It is an arithmetic number, because the mean of its divisors is an integer number (1176313509).

Almost surely, 2^21433430112 is an apocalyptic number.

It is an amenable number.

21433430112 is an abundant number, since it is smaller than the sum of its proper divisors (35029618320).

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

21433430112 is a wasteful number, since it uses less digits than its factorization.

21433430112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794831 (or 794823 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21433430112 its reverse (21103433412), we get a palindrome (42536863524).

The spelling of 21433430112 in words is "twenty-one billion, four hundred thirty-three million, four hundred thirty thousand, one hundred twelve".