19425042500 has 30 divisors (see below), whose sum is σ = 42478688406. Its totient is φ = 7770016000.

The previous prime is 19425042493. The next prime is 19425042517. The reversal of 19425042500 is 524052491.

It can be written as a sum of positive squares in 5 ways, for example, as 3138688576 + 16286353924 = 56024^2 + 127618^2 .

It is a super-2 number, since 2×19425042500² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3882509 + ... + 3887508.

Almost surely, 2^19425042500 is an apocalyptic number.

19425042500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19425042500 is an abundant number, since it is smaller than the sum of its proper divisors (23053645906).

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

19425042500 is an equidigital number, since it uses as much as digits as its factorization.

19425042500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770041 (or 7770024 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 19425042500 its reverse (524052491), we get a palindrome (19949094991).

The spelling of 19425042500 in words is "nineteen billion, four hundred twenty-five million, forty-two thousand, five hundred".