20764536 has 32 divisors (see below), whose sum is σ = 55905360. Its totient is φ = 6388992.

The previous prime is 20764529. The next prime is 20764543. The reversal of 20764536 is 63546702.

It is an interprime number because it is at equal distance from previous prime (20764529) and next prime (20764543).

It is a junction number, because it is equal to n+sod(n) for n = 20764497 and 20764506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32965 + ... + 33588.

Almost surely, 2^20764536 is an apocalyptic number.

20764536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20764536 is an abundant number, since it is smaller than the sum of its proper divisors (35140824).

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

20764536 is a wasteful number, since it uses less digits than its factorization.

20764536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66575 (or 66571 counting only the distinct ones).

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

The square root of 20764536 is about 4556.8120435234. The cubic root of 20764536 is about 274.8573850058.

The spelling of 20764536 in words is "twenty million, seven hundred sixty-four thousand, five hundred thirty-six".