20111672104 has 8 divisors (see below), whose sum is σ = 37709385210. Its totient is φ = 10055836048.

The previous prime is 20111672101. The next prime is 20111672117. The reversal of 20111672104 is 40127611102.

It can be written as a sum of positive squares in only one way, i.e., 13247549604 + 6864122500 = 115098^2 + 82850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20111672101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256979499 + ... + 1256979514.

Almost surely, 2^20111672104 is an apocalyptic number.

It is an amenable number.

20111672104 is a deficient number, since it is larger than the sum of its proper divisors (17597713106).

20111672104 is a wasteful number, since it uses less digits than its factorization.

20111672104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513959019 (or 2513959015 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 20111672104 in words is "twenty billion, one hundred eleven million, six hundred seventy-two thousand, one hundred four".