21445162416 has 60 divisors (see below), whose sum is σ = 60448500840. Its totient is φ = 7096953600.

The previous prime is 21445162373. The next prime is 21445162429. The reversal of 21445162416 is 61426154412.

21445162416 is a `hidden beast` number, since 2 + 14 + 4 + 5 + 1 + 624 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515685 + ... + 555716.

It is an arithmetic number, because the mean of its divisors is an integer number (1007475014).

Almost surely, 2^21445162416 is an apocalyptic number.

It is an amenable number.

21445162416 is an abundant number, since it is smaller than the sum of its proper divisors (39003338424).

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

21445162416 is a wasteful number, since it uses less digits than its factorization.

21445162416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071554 (or 1071545 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The spelling of 21445162416 in words is "twenty-one billion, four hundred forty-five million, one hundred sixty-two thousand, four hundred sixteen".