21618414483 has 8 divisors (see below), whose sum is σ = 28825530768. Its totient is φ = 14411787264.

The previous prime is 21618414439. The next prime is 21618414487. The reversal of 21618414483 is 38441481612.

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

It is not a de Polignac number, because 21618414483 - 2¹⁰ = 21618413459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21618414487) 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, 2310 + ... + 207947.

It is an arithmetic number, because the mean of its divisors is an integer number (3603191346).

Almost surely, 2^21618414483 is an apocalyptic number.

21618414483 is a deficient number, since it is larger than the sum of its proper divisors (7207116285).

21618414483 is a wasteful number, since it uses less digits than its factorization.

21618414483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244533.

The product of its digits is 147456, while the sum is 42.

The spelling of 21618414483 in words is "twenty-one billion, six hundred eighteen million, four hundred fourteen thousand, four hundred eighty-three".