20652644 has 12 divisors (see below), whose sum is σ = 36174768. Its totient is φ = 10317000.

The previous prime is 20652629. The next prime is 20652647. The reversal of 20652644 is 44625602.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20652647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5819 + ... + 8669.

It is an arithmetic number, because the mean of its divisors is an integer number (3014564).

Almost surely, 2^20652644 is an apocalyptic number.

It is an amenable number.

20652644 is a deficient number, since it is larger than the sum of its proper divisors (15522124).

20652644 is a wasteful number, since it uses less digits than its factorization.

20652644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666 (or 4664 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 20652644 is about 4544.5180162477. The cubic root of 20652644 is about 274.3627957447.

It can be divided in two parts, 2065 and 2644, that multiplied together give a triangular number (5459860 = T₃₃₀₄).

The spelling of 20652644 in words is "twenty million, six hundred fifty-two thousand, six hundred forty-four".