20214780 has 48 divisors (see below), whose sum is σ = 57168384. Its totient is φ = 5336640.

The previous prime is 20214767. The next prime is 20214781. The reversal of 20214780 is 8741202.

It is a self number, because there is not a number n which added to its sum of digits gives 20214780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20214781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4545 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (1191008).

Almost surely, 2^20214780 is an apocalyptic number.

20214780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20214780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28584192).

20214780 is an abundant number, since it is smaller than the sum of its proper divisors (36953604).

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

20214780 is a wasteful number, since it uses less digits than its factorization.

20214780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386 (or 3384 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20214780 is about 4496.0849636100. The cubic root of 20214780 is about 272.4099750315.

Adding to 20214780 its reverse (8741202), we get a palindrome (28955982).

It can be divided in two parts, 20214 and 780, that multiplied together give a triangular number (15766920 = T₅₆₁₅).

The spelling of 20214780 in words is "twenty million, two hundred fourteen thousand, seven hundred eighty".