21296513811 has 16 divisors (see below), whose sum is σ = 28505097504. Its totient is φ = 14142879744.

The previous prime is 21296513803. The next prime is 21296513867. The reversal of 21296513811 is 11831569212.

It is not a de Polignac number, because 21296513811 - 2³ = 21296513803 is a prime.

It is a super-3 number, since 3×21296513811³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 21296513811.

It is not an unprimeable number, because it can be changed into a prime (21296513881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1197295 + ... + 1214951.

It is an arithmetic number, because the mean of its divisors is an integer number (1781568594).

Almost surely, 2^21296513811 is an apocalyptic number.

21296513811 is a deficient number, since it is larger than the sum of its proper divisors (7208583693).

21296513811 is a wasteful number, since it uses less digits than its factorization.

21296513811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190.

The product of its digits is 25920, while the sum is 39.

The spelling of 21296513811 in words is "twenty-one billion, two hundred ninety-six million, five hundred thirteen thousand, eight hundred eleven".