19995635204 has 6 divisors (see below), whose sum is σ = 34992361614. Its totient is φ = 9997817600.

The previous prime is 19995635183. The next prime is 19995635237. The reversal of 19995635204 is 40253659991.

It can be written as a sum of positive squares in only one way, i.e., 16537960000 + 3457675204 = 128600^2 + 58802^2 .

It is a super-2 number, since 2×19995635204² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499454397 + ... + 2499454404.

It is an arithmetic number, because the mean of its divisors is an integer number (5832060269).

Almost surely, 2^19995635204 is an apocalyptic number.

It is an amenable number.

19995635204 is a deficient number, since it is larger than the sum of its proper divisors (14996726410).

19995635204 is a wasteful number, since it uses less digits than its factorization.

19995635204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998908805 (or 4998908803 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 19995635204 in words is "nineteen billion, nine hundred ninety-five million, six hundred thirty-five thousand, two hundred four".