20642286220 has 12 divisors (see below), whose sum is σ = 43348801104. Its totient is φ = 8256914480.

The previous prime is 20642286209. The next prime is 20642286233. The reversal of 20642286220 is 2268224602.

It is a super-2 number, since 2×20642286220² (a number of 21 digits) contains 22 as substring.

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, 516057136 + ... + 516057175.

It is an arithmetic number, because the mean of its divisors is an integer number (3612400092).

Almost surely, 2^20642286220 is an apocalyptic number.

20642286220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20642286220 is an abundant number, since it is smaller than the sum of its proper divisors (22706514884).

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

20642286220 is a wasteful number, since it uses less digits than its factorization.

20642286220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032114320 (or 1032114318 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 20642286220 in words is "twenty billion, six hundred forty-two million, two hundred eighty-six thousand, two hundred twenty".