20508046 has 32 divisors (see below), whose sum is σ = 34927200. Its totient is φ = 8964480.

The previous prime is 20508043. The next prime is 20508053. The reversal of 20508046 is 64080502.

It is a self number, because there is not a number n which added to its sum of digits gives 20508046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20508041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44256 + ... + 44716.

It is an arithmetic number, because the mean of its divisors is an integer number (1091475).

Almost surely, 2^20508046 is an apocalyptic number.

20508046 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20508046 is a deficient number, since it is larger than the sum of its proper divisors (14419154).

20508046 is a wasteful number, since it uses less digits than its factorization.

20508046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20508046 is about 4528.5810139601. The cubic root of 20508046 is about 273.7209850888.

Adding to 20508046 its reverse (64080502), we get a palindrome (84588548).

The spelling of 20508046 in words is "twenty million, five hundred eight thousand, forty-six".