20012320004 has 6 divisors (see below), whose sum is σ = 35021560014. Its totient is φ = 10006160000.

The previous prime is 20012319989. The next prime is 20012320037. The reversal of 20012320004 is 40002321002.

It can be written as a sum of positive squares in only one way, i.e., 19071057604 + 941262400 = 138098^2 + 30680^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501539997 + ... + 2501540004.

It is an arithmetic number, because the mean of its divisors is an integer number (5836926669).

Almost surely, 2^20012320004 is an apocalyptic number.

It is an amenable number.

20012320004 is a deficient number, since it is larger than the sum of its proper divisors (15009240010).

20012320004 is a wasteful number, since it uses less digits than its factorization.

20012320004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003080005 (or 5003080003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20012320004 its reverse (40002321002), we get a palindrome (60014641006).

The spelling of 20012320004 in words is "twenty billion, twelve million, three hundred twenty thousand, four".