20124122 has 4 divisors (see below), whose sum is σ = 30186186. Its totient is φ = 10062060.

The previous prime is 20124113. The next prime is 20124127. The reversal of 20124122 is 22142102.

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

It can be written as a sum of positive squares in only one way, i.e., 18757561 + 1366561 = 4331^2 + 1169^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20124097 and 20124106.

It is not an unprimeable number, because it can be changed into a prime (20124127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031029 + ... + 5031032.

Almost surely, 2^20124122 is an apocalyptic number.

20124122 is a deficient number, since it is larger than the sum of its proper divisors (10062064).

20124122 is a wasteful number, since it uses less digits than its factorization.

20124122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062063.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20124122 is about 4485.9917521101. The cubic root of 20124122 is about 272.0021355801.

Adding to 20124122 its reverse (22142102), we get a palindrome (42266224).

The spelling of 20124122 in words is "twenty million, one hundred twenty-four thousand, one hundred twenty-two".