21476516332731 has 16 divisors (see below), whose sum is σ = 28640702042784. Its totient is φ = 14315004370944.

The previous prime is 21476516332679. The next prime is 21476516332751. The reversal of 21476516332731 is 13723361567412.

It is not a de Polignac number, because 21476516332731 - 2⁷ = 21476516332603 is a prime.

It is a super-2 number, since 2×21476516332731² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21476516332751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492186291 + ... + 492229923.

It is an arithmetic number, because the mean of its divisors is an integer number (1790043877674).

Almost surely, 2^{21476516332731} is an apocalyptic number.

21476516332731 is a deficient number, since it is larger than the sum of its proper divisors (7164185710053).

21476516332731 is a wasteful number, since it uses less digits than its factorization.

21476516332731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70510.

The product of its digits is 3810240, while the sum is 51.

The spelling of 21476516332731 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred sixteen million, three hundred thirty-two thousand, seven hundred thirty-one".