21612631316774 has 8 divisors (see below), whose sum is σ = 32424014830368. Its totient is φ = 10804626373320.

The previous prime is 21612631316719. The next prime is 21612631316797. The reversal of 21612631316774 is 47761313621612.

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

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, 844626542 + ... + 844652129.

It is an arithmetic number, because the mean of its divisors is an integer number (4053001853796).

Almost surely, 2^{21612631316774} is an apocalyptic number.

21612631316774 is a deficient number, since it is larger than the sum of its proper divisors (10811383513594).

21612631316774 is a wasteful number, since it uses less digits than its factorization.

21612631316774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689285070.

The product of its digits is 1524096, while the sum is 50.

The spelling of 21612631316774 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty-one million, three hundred sixteen thousand, seven hundred seventy-four".