20676481 has 12 divisors (see below), whose sum is σ = 24126960. Its totient is φ = 17667720.

The previous prime is 20676463. The next prime is 20676493. The reversal of 20676481 is 18467602.

It is not a de Polignac number, because 20676481 - 2⁹ = 20675969 is a prime.

It is a super-2 number, since 2×20676481² = 855033733086722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20676431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27610 + ... + 28348.

It is an arithmetic number, because the mean of its divisors is an integer number (2010580).

Almost surely, 2^20676481 is an apocalyptic number.

It is an amenable number.

20676481 is a deficient number, since it is larger than the sum of its proper divisors (3450479).

20676481 is an equidigital number, since it uses as much as digits as its factorization.

20676481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20676481 is about 4547.1398702921. The cubic root of 20676481 is about 274.4683104261.

The spelling of 20676481 in words is "twenty million, six hundred seventy-six thousand, four hundred eighty-one".