19654040425 has 24 divisors (see below), whose sum is σ = 25812751896. Its totient is φ = 14793661440.

The previous prime is 19654040423. The next prime is 19654040437. The reversal of 19654040425 is 52404045691.

It can be written as a sum of positive squares in 12 ways, for example, as 8773881561 + 10880158864 = 93669^2 + 104308^2 .

It is not a de Polignac number, because 19654040425 - 2¹ = 19654040423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19654040423) 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 23 ways as a sum of consecutive naturals, for example, 1965739 + ... + 1975711.

It is an arithmetic number, because the mean of its divisors is an integer number (1075531329).

Almost surely, 2^19654040425 is an apocalyptic number.

It is an amenable number.

19654040425 is a deficient number, since it is larger than the sum of its proper divisors (6158711471).

19654040425 is a wasteful number, since it uses less digits than its factorization.

19654040425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14637 (or 14632 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 19654040425 in words is "nineteen billion, six hundred fifty-four million, forty thousand, four hundred twenty-five".