21360791432 has 12 divisors (see below), whose sum is σ = 40052259045. Its totient is φ = 10680189024.

The previous prime is 21360791423. The next prime is 21360791437. The reversal of 21360791432 is 23419706312.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 12919959556 + 8440831876 = 113666^2 + 91874^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=103346.

It is a super-2 number, since 2×21360791432² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21360791437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 387548 + ... + 439220.

Almost surely, 2^21360791432 is an apocalyptic number.

It is an amenable number.

21360791432 is a deficient number, since it is larger than the sum of its proper divisors (18691467613).

21360791432 is an frugal number, since it uses more digits than its factorization.

21360791432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103352 (or 51675 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 21360791432 in words is "twenty-one billion, three hundred sixty million, seven hundred ninety-one thousand, four hundred thirty-two".