86220020 has 12 divisors (see below), whose sum is σ = 181062084. Its totient is φ = 34488000.

The previous prime is 86220011. The next prime is 86220041. The reversal of 86220020 is 2002268.

It can be written as a sum of positive squares in 2 ways, for example, as 67798756 + 18421264 = 8234^2 + 4292^2 .

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: 4311001 = 86220020 / (8 + 6 + 2 + 2 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 86219974 and 86220001.

It is a congruent number.

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, 2155481 + ... + 2155520.

It is an arithmetic number, because the mean of its divisors is an integer number (15088507).

Almost surely, 2^86220020 is an apocalyptic number.

It is an amenable number.

86220020 is an abundant number, since it is smaller than the sum of its proper divisors (94842064).

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

86220020 is a wasteful number, since it uses less digits than its factorization.

86220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311010 (or 4311008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 86220020 is about 9285.4736012764. The cubic root of 86220020 is about 441.7765979275.

Adding to 86220020 its reverse (2002268), we get a palindrome (88222288).

The spelling of 86220020 in words is "eighty-six million, two hundred twenty thousand, twenty".