20652949 has 4 divisors (see below), whose sum is σ = 20865964. Its totient is φ = 20439936.

The previous prime is 20652923. The next prime is 20652967. The reversal of 20652949 is 94925602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4708900 + 15944049 = 2170^2 + 3993^2 .

It is a cyclic number.

It is not a de Polignac number, because 20652949 - 2⁵ = 20652917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106362 + ... + 106555.

It is an arithmetic number, because the mean of its divisors is an integer number (5216491).

Almost surely, 2^20652949 is an apocalyptic number.

It is an amenable number.

20652949 is a deficient number, since it is larger than the sum of its proper divisors (213015).

20652949 is an equidigital number, since it uses as much as digits as its factorization.

20652949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213014.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 20652949 is about 4544.5515730378. The cubic root of 20652949 is about 274.3641463424.

The spelling of 20652949 in words is "twenty million, six hundred fifty-two thousand, nine hundred forty-nine".