20020400022 has 32 divisors (see below), whose sum is σ = 45934935552. Its totient is φ = 5698361664.

The previous prime is 20020400017. The next prime is 20020400027. The reversal of 20020400022 is 22000402002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20020400017) and next prime (20020400027).

It is a junction number, because it is equal to n+sod(n) for n = 20020399980 and 20020400007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020400027) 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, 895183 + ... + 917274.

It is an arithmetic number, because the mean of its divisors is an integer number (1435466736).

Almost surely, 2^20020400022 is an apocalyptic number.

20020400022 is an abundant number, since it is smaller than the sum of its proper divisors (25914535530).

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

20020400022 is a wasteful number, since it uses less digits than its factorization.

20020400022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812732.

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

Adding to 20020400022 its reverse (22000402002), we get a palindrome (42020802024).

The spelling of 20020400022 in words is "twenty billion, twenty million, four hundred thousand, twenty-two".