21613081627 has 8 divisors (see below), whose sum is σ = 21688351776. Its totient is φ = 21537851712.

The previous prime is 21613081583. The next prime is 21613081639. The reversal of 21613081627 is 72618031612.

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 21613081627 - 2⁷ = 21613081499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21613081687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406178 + ... + 1421464.

It is an arithmetic number, because the mean of its divisors is an integer number (2711043972).

Almost surely, 2^21613081627 is an apocalyptic number.

21613081627 is a deficient number, since it is larger than the sum of its proper divisors (75270149).

21613081627 is a wasteful number, since it uses less digits than its factorization.

21613081627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20117.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 21613081627 in words is "twenty-one billion, six hundred thirteen million, eighty-one thousand, six hundred twenty-seven".