20950220 has 12 divisors (see below), whose sum is σ = 43995504. Its totient is φ = 8380080.

The previous prime is 20950201. The next prime is 20950229. The reversal of 20950220 is 2205902.

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: 1047511 = 20950220 / (2 + 0 + 9 + 5 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20950192 and 20950201.

It is not an unprimeable number, because it can be changed into a prime (20950229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523736 + ... + 523775.

It is an arithmetic number, because the mean of its divisors is an integer number (3666292).

Almost surely, 2^20950220 is an apocalyptic number.

20950220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20950220 is an abundant number, since it is smaller than the sum of its proper divisors (23045284).

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

20950220 is a wasteful number, since it uses less digits than its factorization.

20950220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047520 (or 1047518 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20950220 is about 4577.1410290704. The cubic root of 20950220 is about 275.6742463549.

The spelling of 20950220 in words is "twenty million, nine hundred fifty thousand, two hundred twenty".