1620159020 has 24 divisors (see below), whose sum is σ = 3408096384. Its totient is φ = 646966016.

The previous prime is 1620159019. The next prime is 1620159049. The reversal of 1620159020 is 209510261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56444 + ... + 80163.

It is an arithmetic number, because the mean of its divisors is an integer number (142004016).

Almost surely, 2^1620159020 is an apocalyptic number.

1620159020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620159020 is an abundant number, since it is smaller than the sum of its proper divisors (1787937364).

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

1620159020 is a wasteful number, since it uses less digits than its factorization.

1620159020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137209 (or 137207 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1620159020 is about 40251.1989883531. The cubic root of 1620159020 is about 1174.4987196274.

Adding to 1620159020 its reverse (209510261), we get a palindrome (1829669281).

The spelling of 1620159020 in words is "one billion, six hundred twenty million, one hundred fifty-nine thousand, twenty".