20770123 has 4 divisors (see below), whose sum is σ = 22658328. Its totient is φ = 18881920.

The previous prime is 20770121. The next prime is 20770133. The reversal of 20770123 is 32107702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20770123 - 2¹ = 20770121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20770094 and 20770103.

It is not an unprimeable number, because it can be changed into a prime (20770121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944086 + ... + 944107.

It is an arithmetic number, because the mean of its divisors is an integer number (5664582).

Almost surely, 2^20770123 is an apocalyptic number.

20770123 is a deficient number, since it is larger than the sum of its proper divisors (1888205).

20770123 is a wasteful number, since it uses less digits than its factorization.

20770123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888204.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20770123 is about 4557.4250405245. The cubic root of 20770123 is about 274.8820342524.

Adding to 20770123 its reverse (32107702), we get a palindrome (52877825).

The spelling of 20770123 in words is "twenty million, seven hundred seventy thousand, one hundred twenty-three".