20001412515 has 64 divisors (see below), whose sum is σ = 37164948480. Its totient is φ = 8996106240.

The previous prime is 20001412511. The next prime is 20001412553. The reversal of 20001412515 is 51521410002.

It is not a de Polignac number, because 20001412515 - 2² = 20001412511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20001412491 and 20001412500.

It is not an unprimeable number, because it can be changed into a prime (20001412511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9573591 + ... + 9575679.

It is an arithmetic number, because the mean of its divisors is an integer number (580702320).

Almost surely, 2^20001412515 is an apocalyptic number.

20001412515 is a deficient number, since it is larger than the sum of its proper divisors (17163535965).

20001412515 is a wasteful number, since it uses less digits than its factorization.

20001412515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20001412515 its reverse (51521410002), we get a palindrome (71522822517).

The spelling of 20001412515 in words is "twenty billion, one million, four hundred twelve thousand, five hundred fifteen".