19056597993 has 24 divisors (see below), whose sum is σ = 28959684936. Its totient is φ = 12059539200.

The previous prime is 19056597991. The next prime is 19056598007. The reversal of 19056597993 is 39979565091.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 218211984 + 18838386009 = 14772^2 + 137253^2 .

It is not a de Polignac number, because 19056597993 - 2¹ = 19056597991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19056597993.

It is not an unprimeable number, because it can be changed into a prime (19056597991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 684238 + ... + 711543.

It is an arithmetic number, because the mean of its divisors is an integer number (1206653539).

Almost surely, 2^19056597993 is an apocalyptic number.

It is an amenable number.

19056597993 is a deficient number, since it is larger than the sum of its proper divisors (9903086943).

19056597993 is a wasteful number, since it uses less digits than its factorization.

19056597993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395865 (or 1395862 counting only the distinct ones).

The product of its (nonzero) digits is 20667150, while the sum is 63.

The spelling of 19056597993 in words is "nineteen billion, fifty-six million, five hundred ninety-seven thousand, nine hundred ninety-three".