21929060249984 has 32 divisors (see below), whose sum is σ = 43687040091240. Its totient is φ = 10964469795840.

The previous prime is 21929060249947. The next prime is 21929060250011. The reversal of 21929060249984 is 48994206092912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 21929060249984.

It is a congruent 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, 31124387 + ... + 31821149.

Almost surely, 2^{21929060249984} is an apocalyptic number.

It is an amenable number.

21929060249984 is a deficient number, since it is larger than the sum of its proper divisors (21757979841256).

21929060249984 is an equidigital number, since it uses as much as digits as its factorization.

21929060249984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942658 (or 942646 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 65.

The spelling of 21929060249984 in words is "twenty-one trillion, nine hundred twenty-nine billion, sixty million, two hundred forty-nine thousand, nine hundred eighty-four".