20985652 has 18 divisors (see below), whose sum is σ = 38762178. Its totient is φ = 9939888.

The previous prime is 20985649. The next prime is 20985703. The reversal of 20985652 is 25658902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 2547216 = 4294^2 + 1596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5823 + ... + 8710.

Almost surely, 2^20985652 is an apocalyptic number.

It is an amenable number.

20985652 is a deficient number, since it is larger than the sum of its proper divisors (17776526).

20985652 is a wasteful number, since it uses less digits than its factorization.

20985652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575 (or 14554 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 20985652 is about 4581.0099323184. The cubic root of 20985652 is about 275.8295699193.

It can be divided in two parts, 2098 and 5652, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 20985652 in words is "twenty million, nine hundred eighty-five thousand, six hundred fifty-two".