1921502016 has 168 divisors, whose sum is σ = 6497913344. Its totient is φ = 531256320.

The previous prime is 1921501997. The next prime is 1921502021. The reversal of 1921502016 is 6102051291.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117306 + ... + 132678.

Almost surely, 2^1921502016 is an apocalyptic number.

1921502016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921502016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3248956672).

1921502016 is an abundant number, since it is smaller than the sum of its proper divisors (4576411328).

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

1921502016 is a wasteful number, since it uses less digits than its factorization.

1921502016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15429 (or 15416 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1921502016 is about 43834.9405839679. The cubic root of 1921502016 is about 1243.2170229677.

The spelling of 1921502016 in words is "one billion, nine hundred twenty-one million, five hundred two thousand, sixteen".