20677641 has 8 divisors (see below), whose sum is σ = 27609120. Its totient is φ = 13765632.

The previous prime is 20677639. The next prime is 20677649. The reversal of 20677641 is 14677602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20677641 - 2¹ = 20677639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20677649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (3451140).

Almost surely, 2^20677641 is an apocalyptic number.

It is an amenable number.

20677641 is a deficient number, since it is larger than the sum of its proper divisors (6931479).

20677641 is an equidigital number, since it uses as much as digits as its factorization.

20677641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9735.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20677641 is about 4547.2674212102. The cubic root of 20677641 is about 274.4734431062.

The spelling of 20677641 in words is "twenty million, six hundred seventy-seven thousand, six hundred forty-one".