20738825 has 12 divisors (see below), whose sum is σ = 26344668. Its totient is φ = 16185600.

The previous prime is 20738821. The next prime is 20738831. The reversal of 20738825 is 52883702.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3341584 + 17397241 = 1828^2 + 4171^2 .

It is not a de Polignac number, because 20738825 - 2² = 20738821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20738821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9092 + ... + 11141.

It is an arithmetic number, because the mean of its divisors is an integer number (2195389).

Almost surely, 2^20738825 is an apocalyptic number.

20738825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20738825 is a deficient number, since it is larger than the sum of its proper divisors (5605843).

20738825 is a wasteful number, since it uses less digits than its factorization.

20738825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20284 (or 20279 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 20738825 is about 4553.9900087725. The cubic root of 20738825 is about 274.7438937949.

The spelling of 20738825 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred twenty-five".