19223955381 has 16 divisors (see below), whose sum is σ = 26950556160. Its totient is φ = 12165170160.

The previous prime is 19223955307. The next prime is 19223955389. The reversal of 19223955381 is 18355932291.

It is not a de Polignac number, because 19223955381 - 2¹⁷ = 19223824309 is a prime.

It is a super-2 number, since 2×19223955381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19223955381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19223955389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054351 + ... + 1072428.

It is an arithmetic number, because the mean of its divisors is an integer number (1684409760).

Almost surely, 2^19223955381 is an apocalyptic number.

It is an amenable number.

19223955381 is a deficient number, since it is larger than the sum of its proper divisors (7726600779).

19223955381 is a wasteful number, since it uses less digits than its factorization.

19223955381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126936.

The product of its digits is 583200, while the sum is 48.

The spelling of 19223955381 in words is "nineteen billion, two hundred twenty-three million, nine hundred fifty-five thousand, three hundred eighty-one".