20005440515 has 8 divisors (see below), whose sum is σ = 24025247568. Its totient is φ = 15991873120.

The previous prime is 20005440509. The next prime is 20005440551. The reversal of 20005440515 is 51504450002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20005440515 - 2¹² = 20005436419 is a prime.

It is a Duffinian 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, 1552856 + ... + 1565685.

It is an arithmetic number, because the mean of its divisors is an integer number (3003155946).

Almost surely, 2^20005440515 is an apocalyptic number.

20005440515 is a deficient number, since it is larger than the sum of its proper divisors (4019807053).

20005440515 is a wasteful number, since it uses less digits than its factorization.

20005440515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119829.

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 20005440515 its reverse (51504450002), we get a palindrome (71509890517).

The spelling of 20005440515 in words is "twenty billion, five million, four hundred forty thousand, five hundred fifteen".