21073437012 has 48 divisors (see below), whose sum is σ = 49989066624. Its totient is φ = 6908160000.

The previous prime is 21073436983. The next prime is 21073437071.

21073437012 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310812 + ... + 372492.

It is an arithmetic number, because the mean of its divisors is an integer number (1041438888).

Almost surely, 2^21073437012 is an apocalyptic number.

It is an amenable number.

21073437012 is an abundant number, since it is smaller than the sum of its proper divisors (28915629612).

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

21073437012 is a wasteful number, since it uses less digits than its factorization.

21073437012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62160 (or 62158 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The spelling of 21073437012 in words is "twenty-one billion, seventy-three million, four hundred thirty-seven thousand, twelve".