20403026 has 32 divisors (see below), whose sum is σ = 37687680. Its totient is φ = 8084736.

The previous prime is 20403023. The next prime is 20403073. The reversal of 20403026 is 62030402.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 20402995 and 20403013.

It is not an unprimeable number, because it can be changed into a prime (20403023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13316 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (1177740).

Almost surely, 2^20403026 is an apocalyptic number.

20403026 is a deficient number, since it is larger than the sum of its proper divisors (17284654).

20403026 is a wasteful number, since it uses less digits than its factorization.

20403026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20403026 is about 4516.9708876635. The cubic root of 20403026 is about 273.2529511139.

Adding to 20403026 its reverse (62030402), we get a palindrome (82433428).

The spelling of 20403026 in words is "twenty million, four hundred three thousand, twenty-six".