21073964750 has 16 divisors (see below), whose sum is σ = 39450462480. Its totient is φ = 8429585800.

The previous prime is 21073964651. The next prime is 21073964759. The reversal of 21073964750 is 5746937012.

It is a super-2 number, since 2×21073964750² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073964759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42147680 + ... + 42148179.

It is an arithmetic number, because the mean of its divisors is an integer number (2465653905).

Almost surely, 2^21073964750 is an apocalyptic number.

21073964750 is a deficient number, since it is larger than the sum of its proper divisors (18376497730).

21073964750 is an equidigital number, since it uses as much as digits as its factorization.

21073964750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84295876 (or 84295866 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 21073964750 in words is "twenty-one billion, seventy-three million, nine hundred sixty-four thousand, seven hundred fifty".