20311061672 has 16 divisors (see below), whose sum is σ = 41545353600. Its totient is φ = 9232300720.

The previous prime is 20311061629. The next prime is 20311061677. The reversal of 20311061672 is 27616011302.

It is not an unprimeable number, because it can be changed into a prime (20311061677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115403672 + ... + 115403847.

It is an arithmetic number, because the mean of its divisors is an integer number (2596584600).

Almost surely, 2^20311061672 is an apocalyptic number.

20311061672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20311061672 is an abundant number, since it is smaller than the sum of its proper divisors (21234291928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311061672 is a wasteful number, since it uses less digits than its factorization.

20311061672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230807536 (or 230807532 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 20311061672 its reverse (27616011302), we get a palindrome (47927072974).

The spelling of 20311061672 in words is "twenty billion, three hundred eleven million, sixty-one thousand, six hundred seventy-two".