20649348 has 36 divisors (see below), whose sum is σ = 53883648. Its totient is φ = 6660720.

The previous prime is 20649347. The next prime is 20649353. The reversal of 20649348 is 84394602.

It is a happy number.

20649348 is a `hidden beast` number, since 2 + 0 + 649 + 3 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20649341) 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 11 ways as a sum of consecutive naturals, for example, 8136 + ... + 10367.

It is an arithmetic number, because the mean of its divisors is an integer number (1496768).

Almost surely, 2^20649348 is an apocalyptic number.

It is an amenable number.

20649348 is an abundant number, since it is smaller than the sum of its proper divisors (33234300).

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

20649348 is a wasteful number, since it uses less digits than its factorization.

20649348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18544 (or 18539 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20649348 is about 4544.1553670622. The cubic root of 20649348 is about 274.3481995848.

The spelling of 20649348 in words is "twenty million, six hundred forty-nine thousand, three hundred forty-eight".