21965428750 has 20 divisors (see below), whose sum is σ = 41172001992. Its totient is φ = 8786171000.

The previous prime is 21965428747. The next prime is 21965428753. The reversal of 21965428750 is 5782456912.

It is an interprime number because it is at equal distance from previous prime (21965428747) and next prime (21965428753).

It is a junction number, because it is equal to n+sod(n) for n = 21965428694 and 21965428703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21965428753) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8784922 + ... + 8787421.

Almost surely, 2^21965428750 is an apocalyptic number.

21965428750 is a deficient number, since it is larger than the sum of its proper divisors (19206573242).

21965428750 is an equidigital number, since it uses as much as digits as its factorization.

21965428750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17572365 (or 17572350 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 21965428750 in words is "twenty-one billion, nine hundred sixty-five million, four hundred twenty-eight thousand, seven hundred fifty".