20106228040 has 16 divisors (see below), whose sum is σ = 45239013180. Its totient is φ = 8042491200.

The previous prime is 20106228017. The next prime is 20106228059. The reversal of 20106228040 is 4082260102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18522665604 + 1583562436 = 136098^2 + 39794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20106227996 and 20106228014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251327811 + ... + 251327890.

Almost surely, 2^20106228040 is an apocalyptic number.

20106228040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20106228040 is an abundant number, since it is smaller than the sum of its proper divisors (25132785140).

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

20106228040 is a wasteful number, since it uses less digits than its factorization.

20106228040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502655712 (or 502655708 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 20106228040 its reverse (4082260102), we get a palindrome (24188488142).

The spelling of 20106228040 in words is "twenty billion, one hundred six million, two hundred twenty-eight thousand, forty".