20402022 has 32 divisors (see below), whose sum is σ = 43365600. Its totient is φ = 6386688.

The previous prime is 20402021. The next prime is 20402087. The reversal of 20402022 is 22020402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20401989 and 20402007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4854 + ... + 8022.

It is an arithmetic number, because the mean of its divisors is an integer number (1355175).

Almost surely, 2^20402022 is an apocalyptic number.

20402022 is an abundant number, since it is smaller than the sum of its proper divisors (22963578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402022 is a wasteful number, since it uses less digits than its factorization.

20402022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20402022 is about 4516.8597498705. The cubic root of 20402022 is about 273.2484689280.

Adding to 20402022 its reverse (22020402), we get a palindrome (42422424).

The spelling of 20402022 in words is "twenty million, four hundred two thousand, twenty-two".