19474202500 has 45 divisors (see below), whose sum is σ = 42601449891. Its totient is φ = 7786890000.

The previous prime is 19474202477. The next prime is 19474202521. The reversal of 19474202500 is 520247491.

The square root of 19474202500 is 139550.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 1526777476 + 17947425024 = 39074^2 + 133968^2 .

It is a super-2 number, since 2×19474202500² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6976105 + ... + 6978895.

Almost surely, 2^19474202500 is an apocalyptic number.

19474202500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19474202500 is the 139550-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19474202500

19474202500 is an abundant number, since it is smaller than the sum of its proper divisors (23127247391).

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

19474202500 is an frugal number, since it uses more digits than its factorization.

19474202500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606 (or 2798 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 19474202500 its reverse (520247491), we get a palindrome (19994449991).

The spelling of 19474202500 in words is "nineteen billion, four hundred seventy-four million, two hundred two thousand, five hundred".