21224706047 has 8 divisors (see below), whose sum is σ = 22003413120. Its totient is φ = 20451876480.

The previous prime is 21224706043. The next prime is 21224706071. The reversal of 21224706047 is 74060742212.

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 21224706047 - 2² = 21224706043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21224705998 and 21224706016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224706043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462022 + ... + 1476467.

It is an arithmetic number, because the mean of its divisors is an integer number (2750426640).

Almost surely, 2^21224706047 is an apocalyptic number.

21224706047 is a deficient number, since it is larger than the sum of its proper divisors (778707073).

21224706047 is a wasteful number, since it uses less digits than its factorization.

21224706047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938753.

The product of its (nonzero) digits is 37632, while the sum is 35.

The spelling of 21224706047 in words is "twenty-one billion, two hundred twenty-four million, seven hundred six thousand, forty-seven".