20148490 has 16 divisors (see below), whose sum is σ = 36628200. Its totient is φ = 7979200.

The previous prime is 20148487. The next prime is 20148497. The reversal of 20148490 is 9484102.

It can be written as a sum of positive squares in 4 ways, for example, as 17131321 + 3017169 = 4139^2 + 1737^2 .

It is not an unprimeable number, because it can be changed into a prime (20148497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8965 + ... + 10984.

Almost surely, 2^20148490 is an apocalyptic number.

20148490 is a deficient number, since it is larger than the sum of its proper divisors (16479710).

20148490 is a wasteful number, since it uses less digits than its factorization.

20148490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20057.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20148490 is about 4488.7069407570. The cubic root of 20148490 is about 272.1118790765. Note that the first 3 decimals are identical.

The spelling of 20148490 in words is "twenty million, one hundred forty-eight thousand, four hundred ninety".