20770647 has 8 divisors (see below), whose sum is σ = 28216944. Its totient is φ = 13585728.

The previous prime is 20770637. The next prime is 20770657. The reversal of 20770647 is 74607702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20770637) and next prime (20770657).

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

It is not a de Polignac number, because 20770647 - 2¹¹ = 20768599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65158 + ... + 65475.

It is an arithmetic number, because the mean of its divisors is an integer number (3527118).

Almost surely, 2^20770647 is an apocalyptic number.

20770647 is a deficient number, since it is larger than the sum of its proper divisors (7446297).

20770647 is a wasteful number, since it uses less digits than its factorization.

20770647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130689.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 20770647 is about 4557.4825287652. The cubic root of 20770647 is about 274.8843458576.

The spelling of 20770647 in words is "twenty million, seven hundred seventy thousand, six hundred forty-seven".