20405752 has 16 divisors (see below), whose sum is σ = 38323440. Its totient is φ = 10186176.

The previous prime is 20405743. The next prime is 20405767. The reversal of 20405752 is 25750402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4228 + ... + 7660.

It is an arithmetic number, because the mean of its divisors is an integer number (2395215).

Almost surely, 2^20405752 is an apocalyptic number.

It is an amenable number.

20405752 is a deficient number, since it is larger than the sum of its proper divisors (17917688).

20405752 is a wasteful number, since it uses less digits than its factorization.

20405752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20405752 is about 4517.2726284784. The cubic root of 20405752 is about 273.2651201319.

The spelling of 20405752 in words is "twenty million, four hundred five thousand, seven hundred fifty-two".