20894484 has 36 divisors (see below), whose sum is σ = 52797696. Its totient is φ = 6428448.

The previous prime is 20894483. The next prime is 20894501. The reversal of 20894484 is 48449802.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894483) 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 11 ways as a sum of consecutive naturals, for example, 3124 + ... + 7179.

Almost surely, 2^20894484 is an apocalyptic number.

It is an amenable number.

20894484 is an abundant number, since it is smaller than the sum of its proper divisors (31903212).

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

20894484 is a wasteful number, since it uses less digits than its factorization.

20894484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336 (or 10321 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 20894484 is about 4571.0484574111. The cubic root of 20894484 is about 275.4295611655.

The spelling of 20894484 in words is "twenty million, eight hundred ninety-four thousand, four hundred eighty-four".