19795990 has 16 divisors (see below), whose sum is σ = 37729152. Its totient is φ = 7452544.

The previous prime is 19795987. The next prime is 19796017. The reversal of 19795990 is 9959791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58054 + ... + 58393.

It is an arithmetic number, because the mean of its divisors is an integer number (2358072).

Almost surely, 2^19795990 is an apocalyptic number.

19795990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19795990 is a deficient number, since it is larger than the sum of its proper divisors (17933162).

19795990 is a wasteful number, since it uses less digits than its factorization.

19795990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116471.

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 19795990 is about 4449.2684791997. The cubic root of 19795990 is about 270.5156583494.

Adding to 19795990 its product of nonzero digits (229635), we get a square (20025625 = 4475²).

The spelling of 19795990 in words is "nineteen million, seven hundred ninety-five thousand, nine hundred ninety".