20311130566 has 8 divisors (see below), whose sum is σ = 30467639520. Its totient is φ = 10155250728.

The previous prime is 20311130503. The next prime is 20311130597. The reversal of 20311130566 is 66503111302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65961 + ... + 212068.

It is an arithmetic number, because the mean of its divisors is an integer number (3808454940).

Almost surely, 2^20311130566 is an apocalyptic number.

20311130566 is a deficient number, since it is larger than the sum of its proper divisors (10156508954).

20311130566 is a wasteful number, since it uses less digits than its factorization.

20311130566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314558.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 20311130566 its reverse (66503111302), we get a palindrome (86814241868).

The spelling of 20311130566 in words is "twenty billion, three hundred eleven million, one hundred thirty thousand, five hundred sixty-six".