20464743 has 16 divisors (see below), whose sum is σ = 30334976. Its totient is φ = 12186720.

The previous prime is 20464723. The next prime is 20464751. The reversal of 20464743 is 34746402.

It is not a de Polignac number, because 20464743 - 2⁵ = 20464711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20464743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464723) 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 15 ways as a sum of consecutive naturals, for example, 7255 + ... + 9672.

It is an arithmetic number, because the mean of its divisors is an integer number (1895936).

Almost surely, 2^20464743 is an apocalyptic number.

20464743 is a deficient number, since it is larger than the sum of its proper divisors (9870233).

20464743 is a wasteful number, since it uses less digits than its factorization.

20464743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16974.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 20464743 is about 4523.7974092570. The cubic root of 20464743 is about 273.5281942176.

The spelling of 20464743 in words is "twenty million, four hundred sixty-four thousand, seven hundred forty-three".