20783925 has 48 divisors (see below), whose sum is σ = 39164160. Its totient is φ = 10800000.

The previous prime is 20783887. The next prime is 20783941. The reversal of 20783925 is 52938702.

It is a happy number.

It is not a de Polignac number, because 20783925 - 2⁷ = 20783797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20783925.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27300 + ... + 28050.

It is an arithmetic number, because the mean of its divisors is an integer number (815920).

Almost surely, 2^20783925 is an apocalyptic number.

20783925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20783925 is a deficient number, since it is larger than the sum of its proper divisors (18380235).

20783925 is a wasteful number, since it uses less digits than its factorization.

20783925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20783925 is about 4558.9390213075. The cubic root of 20783925 is about 274.9429082584.

The spelling of 20783925 in words is "twenty million, seven hundred eighty-three thousand, nine hundred twenty-five".