1605150020 has 48 divisors (see below), whose sum is σ = 3562574400. Its totient is φ = 605808000.

The previous prime is 1605150017. The next prime is 1605150049. The reversal of 1605150020 is 200515061.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1605149974 and 1605150001.

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, 86966 + ... + 103794.

It is an arithmetic number, because the mean of its divisors is an integer number (74220300).

Almost surely, 2^1605150020 is an apocalyptic number.

1605150020 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 1605150020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781287200).

1605150020 is an abundant number, since it is smaller than the sum of its proper divisors (1957424380).

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

1605150020 is a wasteful number, since it uses less digits than its factorization.

1605150020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17108 (or 17106 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1605150020 is about 40064.3235310419. The cubic root of 1605150020 is about 1170.8606471031.

Adding to 1605150020 its reverse (200515061), we get a palindrome (1805665081).

The spelling of 1605150020 in words is "one billion, six hundred five million, one hundred fifty thousand, twenty".