21364104406 has 16 divisors (see below), whose sum is σ = 32255325648. Its totient is φ = 10612447200.

The previous prime is 21364104341. The next prime is 21364104439. The reversal of 21364104406 is 60440146312.

It is a super-3 number, since 3×21364104406³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 340701 + ... + 398503.

It is an arithmetic number, because the mean of its divisors is an integer number (2015957853).

Almost surely, 2^21364104406 is an apocalyptic number.

21364104406 is a deficient number, since it is larger than the sum of its proper divisors (10891221242).

21364104406 is a wasteful number, since it uses less digits than its factorization.

21364104406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59007.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 21364104406 in words is "twenty-one billion, three hundred sixty-four million, one hundred four thousand, four hundred six".