20209148 has 24 divisors (see below), whose sum is σ = 36986880. Its totient is φ = 9650160.

The previous prime is 20209139. The next prime is 20209153. The reversal of 20209148 is 84190202.

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, 8765 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (1541120).

Almost surely, 2^20209148 is an apocalyptic number.

It is an amenable number.

20209148 is a deficient number, since it is larger than the sum of its proper divisors (16777732).

20209148 is a wasteful number, since it uses less digits than its factorization.

20209148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20209148 is about 4495.4585972957. The cubic root of 20209148 is about 272.3846741464.

The spelling of 20209148 in words is "twenty million, two hundred nine thousand, one hundred forty-eight".