19745628452 has 36 divisors (see below), whose sum is σ = 40216015980. Its totient is φ = 8447324160.

The previous prime is 19745628451. The next prime is 19745628481. The reversal of 19745628452 is 25482654791.

It can be written as a sum of positive squares in 2 ways, for example, as 16603353316 + 3142275136 = 128854^2 + 56056^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19745628394 and 19745628403.

It is not an unprimeable number, because it can be changed into a prime (19745628451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1191677 + ... + 1208132.

It is an arithmetic number, because the mean of its divisors is an integer number (1117111555).

Almost surely, 2^19745628452 is an apocalyptic number.

It is an amenable number.

19745628452 is an abundant number, since it is smaller than the sum of its proper divisors (20470387528).

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

19745628452 is a wasteful number, since it uses less digits than its factorization.

19745628452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399852 (or 2399839 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 53.

The spelling of 19745628452 in words is "nineteen billion, seven hundred forty-five million, six hundred twenty-eight thousand, four hundred fifty-two".