21447053750 has 40 divisors (see below), whose sum is σ = 40260818664. Its totient is φ = 8565920000.

The previous prime is 21447053717. The next prime is 21447053813. The reversal of 21447053750 is 5735074412.

It is a super-2 number, since 2×21447053750² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 841190 + ... + 866310.

Almost surely, 2^21447053750 is an apocalyptic number.

21447053750 is a deficient number, since it is larger than the sum of its proper divisors (18813764914).

21447053750 is an equidigital number, since it uses as much as digits as its factorization.

21447053750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25826 (or 25811 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 21447053750 in words is "twenty-one billion, four hundred forty-seven million, fifty-three thousand, seven hundred fifty".