20001000015 has 24 divisors (see below), whose sum is σ = 34671712608. Its totient is φ = 10666180800.

The previous prime is 20001000013. The next prime is 20001000049. The reversal of 20001000015 is 51000010002.

It is a happy number.

It is not a de Polignac number, because 20001000015 - 2¹ = 20001000013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20000999970 and 20001000006.

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 23 ways as a sum of consecutive naturals, for example, 829662 + ... + 853428.

It is an arithmetic number, because the mean of its divisors is an integer number (1444654692).

Almost surely, 2^20001000015 is an apocalyptic number.

20001000015 is a deficient number, since it is larger than the sum of its proper divisors (14670712593).

20001000015 is a wasteful number, since it uses less digits than its factorization.

20001000015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42479 (or 42476 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

Adding to 20001000015 its reverse (51000010002), we get a palindrome (71001010017).

The spelling of 20001000015 in words is "twenty billion, one million, fifteen", and thus it is an aban number and an uban number.