20460380 has 12 divisors (see below), whose sum is σ = 42966840. Its totient is φ = 8184144.

The previous prime is 20460373. The next prime is 20460443. The reversal of 20460380 is 8306402.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511490 + ... + 511529.

It is an arithmetic number, because the mean of its divisors is an integer number (3580570).

Almost surely, 2^20460380 is an apocalyptic number.

20460380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20460380 is an abundant number, since it is smaller than the sum of its proper divisors (22506460).

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

20460380 is a wasteful number, since it uses less digits than its factorization.

20460380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023028 (or 1023026 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20460380 is about 4523.3151559448. The cubic root of 20460380 is about 273.5087544698.

Adding to 20460380 its reverse (8306402), we get a palindrome (28766782).

The spelling of 20460380 in words is "twenty million, four hundred sixty thousand, three hundred eighty".