20675436 has 36 divisors (see below), whose sum is σ = 50446872. Its totient is φ = 6590144.

The previous prime is 20675423. The next prime is 20675437. The reversal of 20675436 is 63457602.

It is a junction number, because it is equal to n+sod(n) for n = 20675397 and 20675406.

It is not an unprimeable number, because it can be changed into a prime (20675437) 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, 4720 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (1401302).

Almost surely, 2^20675436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20675436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25223436).

20675436 is an abundant number, since it is smaller than the sum of its proper divisors (29771436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20675436 is a wasteful number, since it uses less digits than its factorization.

20675436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20675436 is about 4547.0249614446. The cubic root of 20675436 is about 274.4636864249.

It can be divided in two parts, 2067 and 5436, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20675436 in words is "twenty million, six hundred seventy-five thousand, four hundred thirty-six".