19224367981 has 16 divisors (see below), whose sum is σ = 24300244864. Its totient is φ = 14799392064.

The previous prime is 19224367963. The next prime is 19224367991. The reversal of 19224367981 is 18976342291.

It is a cyclic number.

It is not a de Polignac number, because 19224367981 - 2⁵ = 19224367949 is a prime.

It is a super-2 number, since 2×19224367981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19224367951) 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, 2851455 + ... + 2858188.

It is an arithmetic number, because the mean of its divisors is an integer number (1518765304).

Almost surely, 2^19224367981 is an apocalyptic number.

It is an amenable number.

19224367981 is a deficient number, since it is larger than the sum of its proper divisors (5075876883).

19224367981 is a wasteful number, since it uses less digits than its factorization.

19224367981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709700.

The product of its digits is 1306368, while the sum is 52.

The spelling of 19224367981 in words is "nineteen billion, two hundred twenty-four million, three hundred sixty-seven thousand, nine hundred eighty-one".