20770234 has 4 divisors (see below), whose sum is σ = 31155354. Its totient is φ = 10385116.

The previous prime is 20770229. The next prime is 20770237. The reversal of 20770234 is 43207702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43207702 = 2 ⋅21603851.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 5049009 = 3965^2 + 2247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20770199 and 20770208.

It is not an unprimeable number, because it can be changed into a prime (20770237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5192557 + ... + 5192560.

Almost surely, 2^20770234 is an apocalyptic number.

20770234 is a deficient number, since it is larger than the sum of its proper divisors (10385120).

20770234 is a wasteful number, since it uses less digits than its factorization.

20770234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10385119.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20770234 is about 4557.4372184376. The cubic root of 20770234 is about 274.8825239277.

Adding to 20770234 its reverse (43207702), we get a palindrome (63977936).

The spelling of 20770234 in words is "twenty million, seven hundred seventy thousand, two hundred thirty-four".