20071625 has 48 divisors (see below), whose sum is σ = 30410640. Its totient is φ = 13171200.

The previous prime is 20071613. The next prime is 20071631. The reversal of 20071625 is 52617002.

It can be written as a sum of positive squares in 8 ways, for example, as 12694969 + 7376656 = 3563^2 + 2716^2 .

It is not a de Polignac number, because 20071625 - 2¹⁰ = 20070601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20071625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177569 + ... + 177681.

It is an arithmetic number, because the mean of its divisors is an integer number (633555).

Almost surely, 2^20071625 is an apocalyptic number.

20071625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20071625 is a deficient number, since it is larger than the sum of its proper divisors (10339015).

20071625 is a wasteful number, since it uses less digits than its factorization.

20071625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20071625 is about 4480.1367166639. The cubic root of 20071625 is about 271.7654092151.

Adding to 20071625 its reverse (52617002), we get a palindrome (72688627).

The spelling of 20071625 in words is "twenty million, seventy-one thousand, six hundred twenty-five".