2001020016 has 40 divisors (see below), whose sum is σ = 5175699984. Its totient is φ = 666181120.

The previous prime is 2001019997. The next prime is 2001020029. The reversal of 2001020016 is 6100201002.

It is a super-2 number, since 2×2001020016² = 8008162208865280512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001019983 and 2001020010.

It is a congruent number.

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, 14020 + ... + 64796.

Almost surely, 2^2001020016 is an apocalyptic number.

It is an amenable number.

2001020016 is an abundant number, since it is smaller than the sum of its proper divisors (3174679968).

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

2001020016 is a wasteful number, since it uses less digits than its factorization.

2001020016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51609 (or 51603 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2001020016 is about 44732.7622218883. The cubic root of 2001020016 is about 1260.1352034306.

Adding to 2001020016 its reverse (6100201002), we get a palindrome (8101221018).

The spelling of 2001020016 in words is "two billion, one million, twenty thousand, sixteen".