19804606900 has 36 divisors (see below), whose sum is σ = 46281845932. Its totient is φ = 7312469760.

The previous prime is 19804606883. The next prime is 19804606931. The reversal of 19804606900 is 960640891.

It can be written as a sum of positive squares in 6 ways, for example, as 1207284516 + 18597322384 = 34746^2 + 136372^2 .

It is a super-2 number, since 2×19804606900² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7615857 + ... + 7618456.

Almost surely, 2^19804606900 is an apocalyptic number.

19804606900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19804606900 is an abundant number, since it is smaller than the sum of its proper divisors (26477239032).

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

19804606900 is a wasteful number, since it uses less digits than its factorization.

19804606900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15234340 (or 15234333 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 19804606900 in words is "nineteen billion, eight hundred four million, six hundred six thousand, nine hundred".