19948090 has 16 divisors (see below), whose sum is σ = 36237960. Its totient is φ = 7905600.

The previous prime is 19948073. The next prime is 19948091. The reversal of 19948090 is 9084991.

It can be written as a sum of positive squares in 4 ways, for example, as 11716929 + 8231161 = 3423^2 + 2869^2 .

It is not an unprimeable number, because it can be changed into a prime (19948091) 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, 8061 + ... + 10240.

Almost surely, 2^19948090 is an apocalyptic number.

19948090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19948090 is a deficient number, since it is larger than the sum of its proper divisors (16289870).

19948090 is a wasteful number, since it uses less digits than its factorization.

19948090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18417.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19948090 is about 4466.3284697837. The cubic root of 19948090 is about 271.2067158241.

The spelling of 19948090 in words is "nineteen million, nine hundred forty-eight thousand, ninety".