20012531613 has 16 divisors (see below), whose sum is σ = 27756019200. Its totient is φ = 12810450240.

The previous prime is 20012531599. The next prime is 20012531663. The reversal of 20012531613 is 31613521002.

It is not a de Polignac number, because 20012531613 - 2⁹ = 20012531101 is a prime.

It is a super-2 number, since 2×20012531613² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012531663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619693 + ... + 651186.

It is an arithmetic number, because the mean of its divisors is an integer number (1734751200).

Almost surely, 2^20012531613 is an apocalyptic number.

It is an amenable number.

20012531613 is a deficient number, since it is larger than the sum of its proper divisors (7743487587).

20012531613 is a wasteful number, since it uses less digits than its factorization.

20012531613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271092.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 20012531613 in words is "twenty billion, twelve million, five hundred thirty-one thousand, six hundred thirteen".