21930468447 has 8 divisors (see below), whose sum is σ = 29242375344. Its totient is φ = 14619436928.

The previous prime is 21930468409. The next prime is 21930468463. The reversal of 21930468447 is 74486403912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21930468447 - 2⁶ = 21930468383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21930468396 and 21930468405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21930468647) 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 7 ways as a sum of consecutive naturals, for example, 157968 + ... + 262325.

It is an arithmetic number, because the mean of its divisors is an integer number (3655296918).

Almost surely, 2^21930468447 is an apocalyptic number.

21930468447 is a deficient number, since it is larger than the sum of its proper divisors (7311906897).

21930468447 is a wasteful number, since it uses less digits than its factorization.

21930468447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437689.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 21930468447 in words is "twenty-one billion, nine hundred thirty million, four hundred sixty-eight thousand, four hundred forty-seven".