21049294012 has 12 divisors (see below), whose sum is σ = 36837520720. Its totient is φ = 10524288096.

The previous prime is 21049294003. The next prime is 21049294033.

It is a happy number.

21049294012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21049294012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76408 + ... + 218944.

Almost surely, 2^21049294012 is an apocalyptic number.

It is an amenable number.

21049294012 is a deficient number, since it is larger than the sum of its proper divisors (15788226708).

21049294012 is a wasteful number, since it uses less digits than its factorization.

21049294012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179460 (or 179458 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 21049294012 in words is "twenty-one billion, forty-nine million, two hundred ninety-four thousand, twelve".