21041256292 has 12 divisors (see below), whose sum is σ = 42082512640. Its totient is φ = 9017681256.

The previous prime is 21041256277. The next prime is 21041256377. The reversal of 21041256292 is 29265214012.

It is a happy number.

21041256292 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375736692 + ... + 375736747.

Almost surely, 2^21041256292 is an apocalyptic number.

It is an amenable number.

21041256292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21041256292 is a wasteful number, since it uses less digits than its factorization.

21041256292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751473450 (or 751473448 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 21041256292 in words is "twenty-one billion, forty-one million, two hundred fifty-six thousand, two hundred ninety-two".