2001620090 has 32 divisors (see below), whose sum is σ = 3722374656. Its totient is φ = 774146880.

The previous prime is 2001620081. The next prime is 2001620119. The reversal of 2001620090 is 900261002.

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, 498029 + ... + 502031.

It is an arithmetic number, because the mean of its divisors is an integer number (116324208).

Almost surely, 2^2001620090 is an apocalyptic number.

2001620090 is a deficient number, since it is larger than the sum of its proper divisors (1720754566).

2001620090 is a wasteful number, since it uses less digits than its factorization.

2001620090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5654.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2001620090 is about 44739.4690402110. The cubic root of 2001620090 is about 1260.2611556600.

Adding to 2001620090 its reverse (900261002), we get a palindrome (2901881092).

The spelling of 2001620090 in words is "two billion, one million, six hundred twenty thousand, ninety".