21416630356 has 24 divisors (see below), whose sum is σ = 40890001824. Its totient is φ = 9733949280.

The previous prime is 21416630341. The next prime is 21416630359. The reversal of 21416630356 is 65303661412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416630359) 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, 937486 + ... + 960058.

It is an arithmetic number, because the mean of its divisors is an integer number (1703750076).

Almost surely, 2^21416630356 is an apocalyptic number.

It is an amenable number.

21416630356 is a deficient number, since it is larger than the sum of its proper divisors (19473371468).

21416630356 is a wasteful number, since it uses less digits than its factorization.

21416630356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44151 (or 44149 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 21416630356 in words is "twenty-one billion, four hundred sixteen million, six hundred thirty thousand, three hundred fifty-six".