20464704 has 112 divisors (see below), whose sum is σ = 64861440. Its totient is φ = 6289920.

The previous prime is 20464669. The next prime is 20464711. The reversal of 20464704 is 40746402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22009 + ... + 22919.

It is an arithmetic number, because the mean of its divisors is an integer number (579120).

Almost surely, 2^20464704 is an apocalyptic number.

20464704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20464704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32430720).

20464704 is an abundant number, since it is smaller than the sum of its proper divisors (44396736).

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

20464704 is a wasteful number, since it uses less digits than its factorization.

20464704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20464704 is about 4523.7930987170. The cubic root of 20464704 is about 273.5280204618.

The spelling of 20464704 in words is "twenty million, four hundred sixty-four thousand, seven hundred four".