20270805 has 8 divisors (see below), whose sum is σ = 32433312. Its totient is φ = 10811088.

The previous prime is 20270791. The next prime is 20270821. The reversal of 20270805 is 50807202.

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

It is not a de Polignac number, because 20270805 - 2⁵ = 20270773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675679 + ... + 675708.

It is an arithmetic number, because the mean of its divisors is an integer number (4054164).

Almost surely, 2^20270805 is an apocalyptic number.

It is an amenable number.

20270805 is a deficient number, since it is larger than the sum of its proper divisors (12162507).

20270805 is a wasteful number, since it uses less digits than its factorization.

20270805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351395.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 20270805 is about 4502.3110732156. The cubic root of 20270805 is about 272.6614031327.

The spelling of 20270805 in words is "twenty million, two hundred seventy thousand, eight hundred five".