1620020736000 has 1248 divisors, whose sum is σ = 6279089544000. Its totient is φ = 416179814400.

The previous prime is 1620020735929. The next prime is 1620020736017. The reversal of 1620020736000 is 6370200261.

It is a happy number.

1620020736000 is a `hidden beast` number, since 1 + 620 + 0 + 2 + 0 + 7 + 36 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3608063776 + ... + 3608064224.

It is an arithmetic number, because the mean of its divisors is an integer number (5031321750).

Almost surely, 2^{1620020736000} is an apocalyptic number.

1620020736000 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 1620020736000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3139544772000).

1620020736000 is an abundant number, since it is smaller than the sum of its proper divisors (4659068808000).

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

1620020736000 is an frugal number, since it uses more digits than its factorization.

1620020736000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

Adding to 1620020736000 its reverse (6370200261), we get a palindrome (1626390936261).

The spelling of 1620020736000 in words is "one trillion, six hundred twenty billion, twenty million, seven hundred thirty-six thousand".