20616511204 has 24 divisors (see below), whose sum is σ = 36233737848. Its totient is φ = 10264104960.

The previous prime is 20616511199. The next prime is 20616511231. The reversal of 20616511204 is 40211561602.

It can be written as a sum of positive squares in 4 ways, for example, as 3358434304 + 17258076900 = 57952^2 + 131370^2 .

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, 945594 + ... + 967150.

It is an arithmetic number, because the mean of its divisors is an integer number (1509739077).

Almost surely, 2^20616511204 is an apocalyptic number.

It is an amenable number.

20616511204 is a deficient number, since it is larger than the sum of its proper divisors (15617226644).

20616511204 is a wasteful number, since it uses less digits than its factorization.

20616511204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22575 (or 22573 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 20616511204 in words is "twenty billion, six hundred sixteen million, five hundred eleven thousand, two hundred four".