21403152355736 has 16 divisors (see below), whose sum is σ = 40131013609800. Its totient is φ = 10701548726464.

The previous prime is 21403152355733. The next prime is 21403152355747. The reversal of 21403152355736 is 63755325130412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403152355733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95420 + ... + 6543348.

Almost surely, 2^{21403152355736} is an apocalyptic number.

It is an amenable number.

21403152355736 is a deficient number, since it is larger than the sum of its proper divisors (18727861254064).

21403152355736 is a wasteful number, since it uses less digits than its factorization.

21403152355736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862858 (or 6862854 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 47.

The spelling of 21403152355736 in words is "twenty-one trillion, four hundred three billion, one hundred fifty-two million, three hundred fifty-five thousand, seven hundred thirty-six".