21216052643462 has 8 divisors (see below), whose sum is σ = 31824934034256. Its totient is φ = 10607741298712.

The previous prime is 21216052643371. The next prime is 21216052643491. The reversal of 21216052643462 is 26434625061212.

It is a happy number.

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

It is a super-4 number, since 4×21216052643462⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142418453 + ... + 142567344.

It is an arithmetic number, because the mean of its divisors is an integer number (3978116754282).

Almost surely, 2^{21216052643462} is an apocalyptic number.

21216052643462 is a deficient number, since it is larger than the sum of its proper divisors (10608881390794).

21216052643462 is a wasteful number, since it uses less digits than its factorization.

21216052643462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285023022.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 21216052643462 in words is "twenty-one trillion, two hundred sixteen billion, fifty-two million, six hundred forty-three thousand, four hundred sixty-two".