21432902319 has 16 divisors (see below), whose sum is σ = 32154380800. Its totient is φ = 14107731768.

The previous prime is 21432902311. The next prime is 21432902321. The reversal of 21432902319 is 91320923412.

21432902319 is a `hidden beast` number, since 2 + 14 + 329 + 0 + 2 + 319 = 666.

It is not a de Polignac number, because 21432902319 - 2³ = 21432902311 is a prime.

It is a super-2 number, since 2×21432902319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432902311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5021989 + ... + 5026254.

It is an arithmetic number, because the mean of its divisors is an integer number (2009648800).

Almost surely, 2^21432902319 is an apocalyptic number.

21432902319 is a deficient number, since it is larger than the sum of its proper divisors (10721478481).

21432902319 is a wasteful number, since it uses less digits than its factorization.

21432902319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10048331 (or 10048325 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 21432902319 in words is "twenty-one billion, four hundred thirty-two million, nine hundred two thousand, three hundred nineteen".