20510422 has 4 divisors (see below), whose sum is σ = 30765636. Its totient is φ = 10255210.

The previous prime is 20510419. The next prime is 20510429. The reversal of 20510422 is 22401502.

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

It is a junction number, because it is equal to n+sod(n) for n = 20510396 and 20510405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5127604 + ... + 5127607.

It is an arithmetic number, because the mean of its divisors is an integer number (7691409).

Almost surely, 2^20510422 is an apocalyptic number.

20510422 is a deficient number, since it is larger than the sum of its proper divisors (10255214).

20510422 is a wasteful number, since it uses less digits than its factorization.

20510422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10255213.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20510422 is about 4528.8433401918. The cubic root of 20510422 is about 273.7315555083.

Adding to 20510422 its reverse (22401502), we get a palindrome (42911924).

The spelling of 20510422 in words is "twenty million, five hundred ten thousand, four hundred twenty-two".