21606203614 has 8 divisors (see below), whose sum is σ = 32410540008. Its totient is φ = 10802690280.

The previous prime is 21606203557. The next prime is 21606203621. The reversal of 21606203614 is 41630260612.

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, 135312 + ... + 248035.

It is an arithmetic number, because the mean of its divisors is an integer number (4051317501).

Almost surely, 2^21606203614 is an apocalyptic number.

21606203614 is a deficient number, since it is larger than the sum of its proper divisors (10804336394).

21606203614 is a wasteful number, since it uses less digits than its factorization.

21606203614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411530.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 21606203614 in words is "twenty-one billion, six hundred six million, two hundred three thousand, six hundred fourteen".