1021894714432 has 112 divisors (see below), whose sum is σ = 2063242121920. Its totient is φ = 502109798400.

The previous prime is 1021894714427. The next prime is 1021894714453. The reversal of 1021894714432 is 2344174981201.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905132044 + ... + 905133172.

It is an arithmetic number, because the mean of its divisors is an integer number (18421804660).

Almost surely, 2^{1021894714432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021894714432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031621060960).

1021894714432 is an abundant number, since it is smaller than the sum of its proper divisors (1041347407488).

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

1021894714432 is a wasteful number, since it uses less digits than its factorization.

1021894714432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 1021894714432 in words is "one trillion, twenty-one billion, eight hundred ninety-four million, seven hundred fourteen thousand, four hundred thirty-two".