20011312616 has 64 divisors (see below), whose sum is σ = 38496427200. Its totient is φ = 9749818368.

The previous prime is 20011312597. The next prime is 20011312621. The reversal of 20011312616 is 61621311002.

It is a junction number, because it is equal to n+sod(n) for n = 20011312591 and 20011312600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20481920 + ... + 20482896.

It is an arithmetic number, because the mean of its divisors is an integer number (601506675).

Almost surely, 2^20011312616 is an apocalyptic number.

It is an amenable number.

20011312616 is a deficient number, since it is larger than the sum of its proper divisors (18485114584).

20011312616 is a wasteful number, since it uses less digits than its factorization.

20011312616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20011312616 its reverse (61621311002), we get a palindrome (81632623618).

The spelling of 20011312616 in words is "twenty billion, eleven million, three hundred twelve thousand, six hundred sixteen".