20484738 has 40 divisors (see below), whose sum is σ = 47393280. Its totient is φ = 6606360.

The previous prime is 20484733. The next prime is 20484767. The reversal of 20484738 is 83748402.

It is not an unprimeable number, because it can be changed into a prime (20484731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2983 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (1184832).

Almost surely, 2^20484738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20484738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23696640).

20484738 is an abundant number, since it is smaller than the sum of its proper divisors (26908542).

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

20484738 is a wasteful number, since it uses less digits than its factorization.

20484738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 20484738 is about 4526.0068493099. The cubic root of 20484738 is about 273.6172484509.

It can be divided in two parts, 2048 and 4738, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 20484738 in words is "twenty million, four hundred eighty-four thousand, seven hundred thirty-eight".