1620201132 has 108 divisors (see below), whose sum is σ = 4517323720. Its totient is φ = 489265920.

The previous prime is 1620201109. The next prime is 1620201151. The reversal of 1620201132 is 2311020261.

1620201132 is a `hidden beast` number, since 1 + 620 + 2 + 0 + 11 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1885719 + ... + 1886577.

Almost surely, 2^1620201132 is an apocalyptic number.

1620201132 is a gapful number since it is divisible by the number (12) 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 1620201132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2258661860).

1620201132 is an abundant number, since it is smaller than the sum of its proper divisors (2897122588).

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

1620201132 is a wasteful number, since it uses less digits than its factorization.

1620201132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1620201132 is about 40251.7220998059. The cubic root of 1620201132 is about 1174.5088955960.

Adding to 1620201132 its reverse (2311020261), we get a palindrome (3931221393).

The spelling of 1620201132 in words is "one billion, six hundred twenty million, two hundred one thousand, one hundred thirty-two".