19504990 has 16 divisors (see below), whose sum is σ = 35166960. Its totient is φ = 7789120.

The previous prime is 19504951. The next prime is 19504997. The reversal of 19504990 is 9940591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19504997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6885 + ... + 9295.

It is an arithmetic number, because the mean of its divisors is an integer number (2197935).

Almost surely, 2^19504990 is an apocalyptic number.

19504990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19504990 is a deficient number, since it is larger than the sum of its proper divisors (15661970).

19504990 is a wasteful number, since it uses less digits than its factorization.

19504990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 19504990 is about 4416.4454032627. The cubic root of 19504990 is about 269.1835878180.

The spelling of 19504990 in words is "nineteen million, five hundred four thousand, nine hundred ninety".