19500045 has 16 divisors (see below), whose sum is σ = 31363200. Its totient is φ = 10345664.

The previous prime is 19500043. The next prime is 19500049. The reversal of 19500045 is 54000591.

It is a cyclic number.

It is not a de Polignac number, because 19500045 - 2¹ = 19500043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19499988 and 19500024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19500043) 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, 345 + ... + 6254.

It is an arithmetic number, because the mean of its divisors is an integer number (1960200).

Almost surely, 2^19500045 is an apocalyptic number.

19500045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19500045 is a deficient number, since it is larger than the sum of its proper divisors (11863155).

19500045 is a wasteful number, since it uses less digits than its factorization.

19500045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 19500045 is about 4415.8855284076. The cubic root of 19500045 is about 269.1608376508.

The spelling of 19500045 in words is "nineteen million, five hundred thousand, forty-five".