19922168025 has 48 divisors (see below), whose sum is σ = 36625483200. Its totient is φ = 10617108480.

The previous prime is 19922167999. The next prime is 19922168027. The reversal of 19922168025 is 52086122991.

It is a happy number.

It is not a de Polignac number, because 19922168025 - 2⁹ = 19922167513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19922168027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 940602 + ... + 961548.

It is an arithmetic number, because the mean of its divisors is an integer number (763030900).

Almost surely, 2^19922168025 is an apocalyptic number.

19922168025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19922168025 is a deficient number, since it is larger than the sum of its proper divisors (16703315175).

19922168025 is a wasteful number, since it uses less digits than its factorization.

19922168025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22375 (or 22364 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 19922168025 in words is "nineteen billion, nine hundred twenty-two million, one hundred sixty-eight thousand, twenty-five".