64206020 has 12 divisors (see below), whose sum is σ = 134832684. Its totient is φ = 25682400.

The previous prime is 64206013. The next prime is 64206031. The reversal of 64206020 is 2060246.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 55830784 = 2894^2 + 7472^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3210301 = 64206020 / (6 + 4 + 2 + 0 + 6 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 64205983 and 64206001.

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, 1605131 + ... + 1605170.

It is an arithmetic number, because the mean of its divisors is an integer number (11236057).

Almost surely, 2^64206020 is an apocalyptic number.

It is an amenable number.

64206020 is an abundant number, since it is smaller than the sum of its proper divisors (70626664).

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

64206020 is a wasteful number, since it uses less digits than its factorization.

64206020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210310 (or 3210308 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 64206020 is about 8012.8659042817. The cubic root of 64206020 is about 400.4287486057.

Adding to 64206020 its reverse (2060246), we get a palindrome (66266266).

The spelling of 64206020 in words is "sixty-four million, two hundred six thousand, twenty".