20263380 has 48 divisors (see below), whose sum is σ = 56938560. Its totient is φ = 5384448.

The previous prime is 20263379. The next prime is 20263387. The reversal of 20263380 is 8336202.

It is a self number, because there is not a number n which added to its sum of digits gives 20263380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263387) 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, 27051 + ... + 27789.

It is an arithmetic number, because the mean of its divisors is an integer number (1186220).

Almost surely, 2^20263380 is an apocalyptic number.

20263380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20263380 is an abundant number, since it is smaller than the sum of its proper divisors (36675180).

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

20263380 is a wasteful number, since it uses less digits than its factorization.

20263380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20263380 is about 4501.4864211725. The cubic root of 20263380 is about 272.6281079881.

Adding to 20263380 its reverse (8336202), we get a palindrome (28599582).

The spelling of 20263380 in words is "twenty million, two hundred sixty-three thousand, three hundred eighty".