20131011512 has 8 divisors (see below), whose sum is σ = 37745646600. Its totient is φ = 10065505752.

The previous prime is 20131011479. The next prime is 20131011529. The reversal of 20131011512 is 21511013102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20131011512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258188212 + ... + 1258188227.

It is an arithmetic number, because the mean of its divisors is an integer number (4718205825).

Almost surely, 2^20131011512 is an apocalyptic number.

It is an amenable number.

20131011512 is a deficient number, since it is larger than the sum of its proper divisors (17614635088).

20131011512 is a wasteful number, since it uses less digits than its factorization.

20131011512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516376445 (or 2516376441 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 20131011512 its reverse (21511013102), we get a palindrome (41642024614).

The spelling of 20131011512 in words is "twenty billion, one hundred thirty-one million, eleven thousand, five hundred twelve".