19700087450 has 24 divisors (see below), whose sum is σ = 36670975452. Its totient is φ = 7873838720.

The previous prime is 19700087447. The next prime is 19700087453. The reversal of 19700087450 is 5478000791.

It is a Cunningham number, because it is equal to 140357²+1.

It is an interprime number because it is at equal distance from previous prime (19700087447) and next prime (19700087453).

It can be written as a sum of positive squares in 6 ways, for example, as 7428543721 + 12271543729 = 86189^2 + 110777^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19700087398 and 19700087407.

It is not an unprimeable number, because it can be changed into a prime (19700087453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90419 + ... + 218118.

Almost surely, 2^19700087450 is an apocalyptic number.

19700087450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19700087450 is a deficient number, since it is larger than the sum of its proper divisors (16970888002).

19700087450 is a wasteful number, since it uses less digits than its factorization.

19700087450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309826 (or 309821 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 19700087450 in words is "nineteen billion, seven hundred million, eighty-seven thousand, four hundred fifty".