2001769520 has 20 divisors (see below), whose sum is σ = 4654114320. Its totient is φ = 800707776.

The previous prime is 2001769507. The next prime is 2001769607. The reversal of 2001769520 is 259671002.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2001769520² = 8014162422402060800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 12510980 + ... + 12511139.

It is an arithmetic number, because the mean of its divisors is an integer number (232705716).

Almost surely, 2^2001769520 is an apocalyptic number.

2001769520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001769520 is an abundant number, since it is smaller than the sum of its proper divisors (2652344800).

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

2001769520 is a wasteful number, since it uses less digits than its factorization.

2001769520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25022132 (or 25022126 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 2001769520 is about 44741.1390109818. The cubic root of 2001769520 is about 1260.2925162796.

The spelling of 2001769520 in words is "two billion, one million, seven hundred sixty-nine thousand, five hundred twenty".