19048643645 has 6 divisors (see below), whose sum is σ = 22858742718. Its totient is φ = 15238668024.

The previous prime is 19048643639. The next prime is 19048643651. The reversal of 19048643645 is 54634684091.

It is an interprime number because it is at equal distance from previous prime (19048643639) and next prime (19048643651).

It can be written as a sum of positive squares in only one way, i.e., 15238914916 + 3809728729 = 123446^2 + 61723^2 .

It is not a de Polignac number, because 19048643645 - 2¹⁴ = 19048627261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19048643593 and 19048643602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277754 + ... + 339476.

It is an arithmetic number, because the mean of its divisors is an integer number (3809790453).

Almost surely, 2^19048643645 is an apocalyptic number.

It is an amenable number.

19048643645 is a deficient number, since it is larger than the sum of its proper divisors (3810099073).

19048643645 is an frugal number, since it uses more digits than its factorization.

19048643645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123451 (or 61728 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 19048643645 in words is "nineteen billion, forty-eight million, six hundred forty-three thousand, six hundred forty-five".