20470755 has 8 divisors (see below), whose sum is σ = 32753232. Its totient is φ = 10917728.

The previous prime is 20470753. The next prime is 20470763. The reversal of 20470755 is 55707402.

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

It is a cyclic number.

It is not a de Polignac number, because 20470755 - 2¹ = 20470753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20470753) 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, 682344 + ... + 682373.

It is an arithmetic number, because the mean of its divisors is an integer number (4094154).

Almost surely, 2^20470755 is an apocalyptic number.

20470755 is a deficient number, since it is larger than the sum of its proper divisors (12282477).

20470755 is a wasteful number, since it uses less digits than its factorization.

20470755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364725.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 20470755 is about 4524.4618464520. The cubic root of 20470755 is about 273.5549767105.

The spelling of 20470755 in words is "twenty million, four hundred seventy thousand, seven hundred fifty-five".