21574616621366 has 8 divisors (see below), whose sum is σ = 32377040270064. Its totient is φ = 10782269864680.

The previous prime is 21574616621359. The next prime is 21574616621407. The reversal of 21574616621366 is 66312661647512.

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, 2519217650 + ... + 2519226213.

It is an arithmetic number, because the mean of its divisors is an integer number (4047130033758).

Almost surely, 2^{21574616621366} is an apocalyptic number.

21574616621366 is a deficient number, since it is larger than the sum of its proper divisors (10802423648698).

21574616621366 is a wasteful number, since it uses less digits than its factorization.

21574616621366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038446006.

The product of its digits is 13063680, while the sum is 56.

The spelling of 21574616621366 in words is "twenty-one trillion, five hundred seventy-four billion, six hundred sixteen million, six hundred twenty-one thousand, three hundred sixty-six".