20118022 has 4 divisors (see below), whose sum is σ = 30177036. Its totient is φ = 10059010.

The previous prime is 20118013. The next prime is 20118029. The reversal of 20118022 is 22081102.

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 = 20117987 and 20118005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5029504 + ... + 5029507.

It is an arithmetic number, because the mean of its divisors is an integer number (7544259).

Almost surely, 2^20118022 is an apocalyptic number.

20118022 is the 2398-th centered heptagonal number.

20118022 is a deficient number, since it is larger than the sum of its proper divisors (10059014).

20118022 is a wasteful number, since it uses less digits than its factorization.

20118022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10059013.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20118022 is about 4485.3118063296. The cubic root of 20118022 is about 271.9746498145.

Adding to 20118022 its reverse (22081102), we get a palindrome (42199124).

The spelling of 20118022 in words is "twenty million, one hundred eighteen thousand, twenty-two".