1021602481920 has 432 divisors, whose sum is σ = 3858496736640. Its totient is φ = 258087555072.

The previous prime is 1021602481919. The next prime is 1021602481943. The reversal of 1021602481920 is 291842061201.

1021602481920 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 602 + 48 + 1 + 9 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5823327 + ... + 5996193.

Almost surely, 2^{1021602481920} is an apocalyptic number.

1021602481920 is a gapful number since it is divisible by the number (10) 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 1021602481920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929248368320).

1021602481920 is an abundant number, since it is smaller than the sum of its proper divisors (2836894254720).

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

1021602481920 is an equidigital number, since it uses as much as digits as its factorization.

1021602481920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172922 (or 172896 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 1021602481920 in words is "one trillion, twenty-one billion, six hundred two million, four hundred eighty-one thousand, nine hundred twenty".