20368380 has 96 divisors (see below), whose sum is σ = 63624960. Its totient is φ = 4838400.

The previous prime is 20368373. The next prime is 20368417. The reversal of 20368380 is 8386302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18855 + ... + 19905.

It is an arithmetic number, because the mean of its divisors is an integer number (662760).

Almost surely, 2^20368380 is an apocalyptic number.

20368380 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 20368380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31812480).

20368380 is an abundant number, since it is smaller than the sum of its proper divisors (43256580).

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

20368380 is a wasteful number, since it uses less digits than its factorization.

20368380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20368380 is about 4513.1341659649. The cubic root of 20368380 is about 273.0981948953.

The spelling of 20368380 in words is "twenty million, three hundred sixty-eight thousand, three hundred eighty".