20320148 has 6 divisors (see below), whose sum is σ = 35560266. Its totient is φ = 10160072.

The previous prime is 20320103. The next prime is 20320171. The reversal of 20320148 is 84102302.

It can be written as a sum of positive squares in only one way, i.e., 18421264 + 1898884 = 4292^2 + 1378^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540015 + ... + 2540022.

It is an arithmetic number, because the mean of its divisors is an integer number (5926711).

Almost surely, 2^20320148 is an apocalyptic number.

It is an amenable number.

20320148 is a deficient number, since it is larger than the sum of its proper divisors (15240118).

20320148 is a wasteful number, since it uses less digits than its factorization.

20320148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080041 (or 5080039 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20320148 is about 4507.7874838994. The cubic root of 20320148 is about 272.8824604592.

The spelling of 20320148 in words is "twenty million, three hundred twenty thousand, one hundred forty-eight".