20515041265 has 8 divisors (see below), whose sum is σ = 24685130880. Its totient is φ = 16367312112.

The previous prime is 20515041259. The next prime is 20515041307. The reversal of 20515041265 is 56214051502.

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

It is a cyclic number.

It is not a de Polignac number, because 20515041265 - 2²¹ = 20512944113 is a prime.

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, 5588095 + ... + 5591764.

It is an arithmetic number, because the mean of its divisors is an integer number (3085641360).

Almost surely, 2^20515041265 is an apocalyptic number.

It is an amenable number.

20515041265 is a deficient number, since it is larger than the sum of its proper divisors (4170089615).

20515041265 is a wasteful number, since it uses less digits than its factorization.

20515041265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11180231.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20515041265 its reverse (56214051502), we get a palindrome (76729092767).

The spelling of 20515041265 in words is "twenty billion, five hundred fifteen million, forty-one thousand, two hundred sixty-five".