19621442853 has 24 divisors (see below), whose sum is σ = 29582210112. Its totient is φ = 12508898688.

The previous prime is 19621442849. The next prime is 19621442881. The reversal of 19621442853 is 35824412691.

19621442853 is a `hidden beast` number, since 1 + 9 + 6 + 214 + 428 + 5 + 3 = 666.

It is not a de Polignac number, because 19621442853 - 2² = 19621442849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19621442799 and 19621442808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621042853) 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, 942525 + ... + 963117.

It is an arithmetic number, because the mean of its divisors is an integer number (1232592088).

Almost surely, 2^19621442853 is an apocalyptic number.

It is an amenable number.

19621442853 is a deficient number, since it is larger than the sum of its proper divisors (9960767259).

19621442853 is a wasteful number, since it uses less digits than its factorization.

19621442853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25225 (or 25222 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 19621442853 in words is "nineteen billion, six hundred twenty-one million, four hundred forty-two thousand, eight hundred fifty-three".