19289664953 has 12 divisors (see below), whose sum is σ = 21292537644. Its totient is φ = 17371536000.

The previous prime is 19289664931. The next prime is 19289664959. The reversal of 19289664953 is 35946698291.

It can be written as a sum of positive squares in 6 ways, for example, as 7869109264 + 11420555689 = 88708^2 + 106867^2 .

It is not a de Polignac number, because 19289664953 - 2¹² = 19289660857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19289664959) 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, 419498 + ... + 463203.

It is an arithmetic number, because the mean of its divisors is an integer number (1774378137).

Almost surely, 2^19289664953 is an apocalyptic number.

19289664953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19289664953 is a deficient number, since it is larger than the sum of its proper divisors (2002872691).

19289664953 is an equidigital number, since it uses as much as digits as its factorization.

19289664953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882796 (or 882755 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 62.

The spelling of 19289664953 in words is "nineteen billion, two hundred eighty-nine million, six hundred sixty-four thousand, nine hundred fifty-three".