21425364467 has 4 divisors (see below), whose sum is σ = 23073469440. Its totient is φ = 19777259496.

The previous prime is 21425364437. The next prime is 21425364511. The reversal of 21425364467 is 76446352412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21425364467 - 2¹² = 21425360371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21425364437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824052467 + ... + 824052492.

It is an arithmetic number, because the mean of its divisors is an integer number (5768367360).

Almost surely, 2^21425364467 is an apocalyptic number.

21425364467 is a deficient number, since it is larger than the sum of its proper divisors (1648104973).

21425364467 is a wasteful number, since it uses less digits than its factorization.

21425364467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648104972.

The product of its digits is 967680, while the sum is 44.

The spelling of 21425364467 in words is "twenty-one billion, four hundred twenty-five million, three hundred sixty-four thousand, four hundred sixty-seven".