13040021511 has 24 divisors (see below), whose sum is σ = 21441303936. Its totient is φ = 7559431440.

The previous prime is 13040021503. The next prime is 13040021521. The reversal of 13040021511 is 11512004031.

13040021511 is a `hidden beast` number, since 130 + 4 + 0 + 0 + 21 + 511 = 666.

It is not a de Polignac number, because 13040021511 - 2³ = 13040021503 is a prime.

It is a super-2 number, since 2×13040021511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040021521) 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, 2861145 + ... + 2865698.

It is an arithmetic number, because the mean of its divisors is an integer number (893387664).

Almost surely, 2^13040021511 is an apocalyptic number.

13040021511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13040021511 is a deficient number, since it is larger than the sum of its proper divisors (8401282425).

13040021511 is a wasteful number, since it uses less digits than its factorization.

13040021511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726883 (or 5726880 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 13040021511 its reverse (11512004031), we get a palindrome (24552025542).

The spelling of 13040021511 in words is "thirteen billion, forty million, twenty-one thousand, five hundred eleven".