20046403 has 4 divisors (see below), whose sum is σ = 21588448. Its totient is φ = 18504360.

The previous prime is 20046401. The next prime is 20046413. The reversal of 20046403 is 30464002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30464002 = 2 ⋅15232001.

It is a cyclic number.

It is not a de Polignac number, because 20046403 - 2¹ = 20046401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20046401) 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 3 ways as a sum of consecutive naturals, for example, 771003 + ... + 771028.

It is an arithmetic number, because the mean of its divisors is an integer number (5397112).

Almost surely, 2^20046403 is an apocalyptic number.

20046403 is a deficient number, since it is larger than the sum of its proper divisors (1542045).

20046403 is a wasteful number, since it uses less digits than its factorization.

20046403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542044.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20046403 is about 4477.3209623613. The cubic root of 20046403 is about 271.6515280476.

It can be divided in two parts, 20046 and 403, that added together give a square (20449 = 143²).

The spelling of 20046403 in words is "twenty million, forty-six thousand, four hundred three".