19225950981 has 16 divisors (see below), whose sum is σ = 27278928000. Its totient is φ = 12002715648.

The previous prime is 19225950959. The next prime is 19225951009. The reversal of 19225950981 is 18905952291.

It is a happy number.

It is not a de Polignac number, because 19225950981 - 2⁵ = 19225950949 is a prime.

It is a super-2 number, since 2×19225950981² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19225950901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 937036 + ... + 957333.

It is an arithmetic number, because the mean of its divisors is an integer number (1704933000).

Almost surely, 2^19225950981 is an apocalyptic number.

It is an amenable number.

19225950981 is a deficient number, since it is larger than the sum of its proper divisors (8052977019).

19225950981 is a wasteful number, since it uses less digits than its factorization.

19225950981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894588.

The product of its (nonzero) digits is 583200, while the sum is 51.

The spelling of 19225950981 in words is "nineteen billion, two hundred twenty-five million, nine hundred fifty thousand, nine hundred eighty-one".