20009360 has 40 divisors (see below), whose sum is σ = 53169216. Its totient is φ = 6860160.

The previous prime is 20009347. The next prime is 20009371. The reversal of 20009360 is 6390002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17306 + ... + 18425.

Almost surely, 2^20009360 is an apocalyptic number.

20009360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20009360 is an abundant number, since it is smaller than the sum of its proper divisors (33159856).

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

20009360 is a wasteful number, since it uses less digits than its factorization.

20009360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35751 (or 35745 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20009360 is about 4473.1823124036. The cubic root of 20009360 is about 271.4840999702.

Adding to 20009360 its reverse (6390002), we get a palindrome (26399362).

The spelling of 20009360 in words is "twenty million, nine thousand, three hundred sixty".