20256546 has 32 divisors (see below), whose sum is σ = 42989760. Its totient is φ = 6345216.

The previous prime is 20256541. The next prime is 20256557. The reversal of 20256546 is 64565202.

It is not an unprimeable number, because it can be changed into a prime (20256541) 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, 14970 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (1343430).

Almost surely, 2^20256546 is an apocalyptic number.

20256546 is an abundant number, since it is smaller than the sum of its proper divisors (22733214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20256546 is a wasteful number, since it uses less digits than its factorization.

20256546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20256546 is about 4500.7272745635. The cubic root of 20256546 is about 272.5974558135.

It can be divided in two parts, 20256 and 546, that added together give a palindrome (20802).

The spelling of 20256546 in words is "twenty million, two hundred fifty-six thousand, five hundred forty-six".