21416535654 has 16 divisors (see below), whose sum is σ = 42836975280. Its totient is φ = 7138194560.

The previous prime is 21416535649. The next prime is 21416535671. The reversal of 21416535654 is 45653561412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88767 + ... + 225194.

It is an arithmetic number, because the mean of its divisors is an integer number (2677310955).

Almost surely, 2^21416535654 is an apocalyptic number.

21416535654 is an abundant number, since it is smaller than the sum of its proper divisors (21420439626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21416535654 is a wasteful number, since it uses less digits than its factorization.

21416535654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325335.

The product of its digits is 432000, while the sum is 42.

The spelling of 21416535654 in words is "twenty-one billion, four hundred sixteen million, five hundred thirty-five thousand, six hundred fifty-four".