20404148 has 24 divisors (see below), whose sum is σ = 38029824. Its totient is φ = 9545600.

The previous prime is 20404133. The next prime is 20404159. The reversal of 20404148 is 84140402.

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, 12203 + ... + 13773.

It is an arithmetic number, because the mean of its divisors is an integer number (1584576).

Almost surely, 2^20404148 is an apocalyptic number.

It is an amenable number.

20404148 is a deficient number, since it is larger than the sum of its proper divisors (17625676).

20404148 is a wasteful number, since it uses less digits than its factorization.

20404148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20404148 is about 4517.0950842328. The cubic root of 20404148 is about 273.2579599165.

The spelling of 20404148 in words is "twenty million, four hundred four thousand, one hundred forty-eight".