20436625 has 32 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 14608000.

The previous prime is 20436623. The next prime is 20436629. The reversal of 20436625 is 52663402.

It is a happy number.

It is not a de Polignac number, because 20436625 - 2¹ = 20436623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20436593 and 20436602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122292 + ... + 122458.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^20436625 is an apocalyptic number.

20436625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20436625 is a deficient number, since it is larger than the sum of its proper divisors (7868015).

20436625 is a wasteful number, since it uses less digits than its factorization.

20436625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20436625 is about 4520.6885537493. The cubic root of 20436625 is about 273.4028633678.

It can be divided in two parts, 2043 and 6625, that added together give a palindrome (8668).

The spelling of 20436625 in words is "twenty million, four hundred thirty-six thousand, six hundred twenty-five".