20611131304 has 32 divisors (see below), whose sum is σ = 39389328000. Its totient is φ = 10108786240.

The previous prime is 20611131283. The next prime is 20611131329. The reversal of 20611131304 is 40313111602.

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, 19797 + ... + 203995.

It is an arithmetic number, because the mean of its divisors is an integer number (1230916500).

Almost surely, 2^20611131304 is an apocalyptic number.

It is an amenable number.

20611131304 is a deficient number, since it is larger than the sum of its proper divisors (18778196696).

20611131304 is a wasteful number, since it uses less digits than its factorization.

20611131304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184473 (or 184469 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20611131304 its reverse (40313111602), we get a palindrome (60924242906).

The spelling of 20611131304 in words is "twenty billion, six hundred eleven million, one hundred thirty-one thousand, three hundred four".