20001000016 has 40 divisors (see below), whose sum is σ = 39941253864. Its totient is φ = 9695508480.

The previous prime is 20001000013. The next prime is 20001000049. The reversal of 20001000016 is 61000010002.

It can be written as a sum of positive squares in 4 ways, for example, as 5166734400 + 14834265616 = 71880^2 + 121796^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20000999966 and 20001000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001000013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106236 + ... + 226468.

Almost surely, 2^20001000016 is an apocalyptic number.

It is an amenable number.

20001000016 is a deficient number, since it is larger than the sum of its proper divisors (19940253848).

20001000016 is a wasteful number, since it uses less digits than its factorization.

20001000016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120559 (or 120553 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20001000016 its reverse (61000010002), we get a palindrome (81001010018).

The spelling of 20001000016 in words is "twenty billion, one million, sixteen", and thus it is an aban number and an uban number.