622220020 has 12 divisors (see below), whose sum is σ = 1306662084. Its totient is φ = 248888000.

The previous prime is 622219993. The next prime is 622220023. The reversal of 622220020 is 20022226.

It can be written as a sum of positive squares in 2 ways, for example, as 88887184 + 533332836 = 9428^2 + 23094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 622219976 and 622220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622220023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15555481 + ... + 15555520.

It is an arithmetic number, because the mean of its divisors is an integer number (108888507).

Almost surely, 2^622220020 is an apocalyptic number.

It is an amenable number.

622220020 is an abundant number, since it is smaller than the sum of its proper divisors (684442064).

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

622220020 is a wasteful number, since it uses less digits than its factorization.

622220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31111010 (or 31111008 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 622220020 is about 24944.3384358054. The cubic root of 622220020 is about 853.7184361381.

Adding to 622220020 its reverse (20022226), we get a palindrome (642242246).

The spelling of 622220020 in words is "six hundred twenty-two million, two hundred twenty thousand, twenty".