19752444945 has 40 divisors (see below), whose sum is σ = 35423688960. Its totient is φ = 10529995680.

The previous prime is 19752444889. The next prime is 19752444947. The reversal of 19752444945 is 54944425791.

19752444945 is a `hidden beast` number, since 197 + 5 + 2 + 4 + 449 + 4 + 5 = 666.

It is not a de Polignac number, because 19752444945 - 2⁹ = 19752444433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19752444891 and 19752444900.

It is not an unprimeable number, because it can be changed into a prime (19752444947) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1035040 + ... + 1053950.

It is an arithmetic number, because the mean of its divisors is an integer number (885592224).

Almost surely, 2^19752444945 is an apocalyptic number.

19752444945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19752444945 is a deficient number, since it is larger than the sum of its proper divisors (15671244015).

19752444945 is a wasteful number, since it uses less digits than its factorization.

19752444945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21507 (or 21498 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 19752444945 in words is "nineteen billion, seven hundred fifty-two million, four hundred forty-four thousand, nine hundred forty-five".