21125063750 has 120 divisors (see below), whose sum is σ = 46251382320. Its totient is φ = 7213080000.

The previous prime is 21125063723. The next prime is 21125063783. The reversal of 21125063750 is 5736052112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 19048196 + ... + 19049304.

It is an arithmetic number, because the mean of its divisors is an integer number (385428186).

Almost surely, 2^21125063750 is an apocalyptic number.

21125063750 is an abundant number, since it is smaller than the sum of its proper divisors (25126318570).

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

21125063750 is a wasteful number, since it uses less digits than its factorization.

21125063750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 21125063750 in words is "twenty-one billion, one hundred twenty-five million, sixty-three thousand, seven hundred fifty".