20408703 has 32 divisors (see below), whose sum is σ = 32288256. Its totient is φ = 11225088.

The previous prime is 20408701. The next prime is 20408711. The reversal of 20408703 is 30780402.

It is not a de Polignac number, because 20408703 - 2¹ = 20408701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87475 + ... + 87707.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^20408703 is an apocalyptic number.

20408703 is a deficient number, since it is larger than the sum of its proper divisors (11879553).

20408703 is a wasteful number, since it uses less digits than its factorization.

20408703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20408703 is about 4517.5992518151. The cubic root of 20408703 is about 273.2782923411.

The spelling of 20408703 in words is "twenty million, four hundred eight thousand, seven hundred three".