19825018074 has 12 divisors (see below), whose sum is σ = 42954205866. Its totient is φ = 6608339352.

The previous prime is 19825018069. The next prime is 19825018079. The reversal of 19825018074 is 47081052891.

It is an interprime number because it is at equal distance from previous prime (19825018069) and next prime (19825018079).

It can be written as a sum of positive squares in only one way, i.e., 18321517449 + 1503500625 = 135357^2 + 38775^2 .

It is not an unprimeable number, because it can be changed into a prime (19825018079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 550694929 + ... + 550694964.

Almost surely, 2^19825018074 is an apocalyptic number.

19825018074 is an abundant number, since it is smaller than the sum of its proper divisors (23129187792).

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

19825018074 is a wasteful number, since it uses less digits than its factorization.

19825018074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101389901 (or 1101389898 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 19825018074 in words is "nineteen billion, eight hundred twenty-five million, eighteen thousand, seventy-four".