21074133012 has 12 divisors (see below), whose sum is σ = 49172977056. Its totient is φ = 7024711000.

The previous prime is 21074132993. The next prime is 21074133013. The reversal of 21074133012 is 21033147012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21074133013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 878088864 + ... + 878088887.

It is an arithmetic number, because the mean of its divisors is an integer number (4097748088).

Almost surely, 2^21074133012 is an apocalyptic number.

It is an amenable number.

21074133012 is an abundant number, since it is smaller than the sum of its proper divisors (28098844044).

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

21074133012 is a wasteful number, since it uses less digits than its factorization.

21074133012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756177758 (or 1756177756 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The spelling of 21074133012 in words is "twenty-one billion, seventy-four million, one hundred thirty-three thousand, twelve".