19448921854 has 16 divisors (see below), whose sum is σ = 32043991680. Its totient is φ = 8812096920.

The previous prime is 19448921819. The next prime is 19448921861. The reversal of 19448921854 is 45812984491.

It is a super-2 number, since 2×19448921854² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19448921795 and 19448921804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11125512 + ... + 11127259.

It is an arithmetic number, because the mean of its divisors is an integer number (2002749480).

Almost surely, 2^19448921854 is an apocalyptic number.

19448921854 is a deficient number, since it is larger than the sum of its proper divisors (12595069826).

19448921854 is a wasteful number, since it uses less digits than its factorization.

19448921854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22252815.

The product of its digits is 3317760, while the sum is 55.

The spelling of 19448921854 in words is "nineteen billion, four hundred forty-eight million, nine hundred twenty-one thousand, eight hundred fifty-four".