21296513810 has 64 divisors (see below), whose sum is σ = 45472976640. Its totient is φ = 7079028480.

The previous prime is 21296513803. The next prime is 21296513867. The reversal of 21296513810 is 1831569212.

It is a happy number.

It is a super-2 number, since 2×21296513810² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74996 + ... + 219584.

It is an arithmetic number, because the mean of its divisors is an integer number (710515260).

Almost surely, 2^21296513810 is an apocalyptic number.

21296513810 is an abundant number, since it is smaller than the sum of its proper divisors (24176462830).

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

21296513810 is a wasteful number, since it uses less digits than its factorization.

21296513810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144723.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 21296513810 in words is "twenty-one billion, two hundred ninety-six million, five hundred thirteen thousand, eight hundred ten".