20725148 has 6 divisors (see below), whose sum is σ = 36269016. Its totient is φ = 10362572.

The previous prime is 20725129. The next prime is 20725153. The reversal of 20725148 is 84152702.

It is a self number, because there is not a number n which added to its sum of digits gives 20725148.

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, 2590640 + ... + 2590647.

It is an arithmetic number, because the mean of its divisors is an integer number (6044836).

Almost surely, 2^20725148 is an apocalyptic number.

It is an amenable number.

20725148 is a deficient number, since it is larger than the sum of its proper divisors (15543868).

20725148 is a wasteful number, since it uses less digits than its factorization.

20725148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181291 (or 5181289 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 20725148 is about 4552.4881109125. The cubic root of 20725148 is about 274.6834837736.

The spelling of 20725148 in words is "twenty million, seven hundred twenty-five thousand, one hundred forty-eight".