20223820 has 12 divisors (see below), whose sum is σ = 42470064. Its totient is φ = 8089520.

The previous prime is 20223787. The next prime is 20223839. The reversal of 20223820 is 2832202.

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, 505576 + ... + 505615.

It is an arithmetic number, because the mean of its divisors is an integer number (3539172).

Almost surely, 2^20223820 is an apocalyptic number.

20223820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20223820 is an abundant number, since it is smaller than the sum of its proper divisors (22246244).

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

20223820 is a wasteful number, since it uses less digits than its factorization.

20223820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011200 (or 1011198 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20223820 is about 4497.0901703212. The cubic root of 20223820 is about 272.4505760040.

The spelling of 20223820 in words is "twenty million, two hundred twenty-three thousand, eight hundred twenty".