20069725 has 24 divisors (see below), whose sum is σ = 27541640. Its totient is φ = 14411520.

The previous prime is 20069723. The next prime is 20069729. The reversal of 20069725 is 52796002.

It can be written as a sum of positive squares in 12 ways, for example, as 4372281 + 15697444 = 2091^2 + 3962^2 .

It is not a de Polignac number, because 20069725 - 2¹ = 20069723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20069723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11191 + ... + 12859.

Almost surely, 2^20069725 is an apocalyptic number.

20069725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20069725 is a deficient number, since it is larger than the sum of its proper divisors (7471915).

20069725 is a wasteful number, since it uses less digits than its factorization.

20069725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1724 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20069725 is about 4479.9246645452. The cubic root of 20069725 is about 271.7568337498.

The spelling of 20069725 in words is "twenty million, sixty-nine thousand, seven hundred twenty-five".