20732380 has 12 divisors (see below), whose sum is σ = 43538040. Its totient is φ = 8292944.

The previous prime is 20732377. The next prime is 20732389. The reversal of 20732380 is 8323702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20732389) 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, 518290 + ... + 518329.

It is an arithmetic number, because the mean of its divisors is an integer number (3628170).

Almost surely, 2^20732380 is an apocalyptic number.

20732380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20732380 is an abundant number, since it is smaller than the sum of its proper divisors (22805660).

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

20732380 is a wasteful number, since it uses less digits than its factorization.

20732380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036628 (or 1036626 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20732380 is about 4553.2823325597. The cubic root of 20732380 is about 274.7154301467.

It can be divided in two parts, 20732 and 380, that added together give a palindrome (21112).

The spelling of 20732380 in words is "twenty million, seven hundred thirty-two thousand, three hundred eighty".