20009364 has 12 divisors (see below), whose sum is σ = 46688544. Its totient is φ = 6669784.

The previous prime is 20009347. The next prime is 20009371. The reversal of 20009364 is 46390002.

It is a tau number, because it is divible by the number of its divisors (12).

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, 833712 + ... + 833735.

It is an arithmetic number, because the mean of its divisors is an integer number (3890712).

Almost surely, 2^20009364 is an apocalyptic number.

It is an amenable number.

20009364 is an abundant number, since it is smaller than the sum of its proper divisors (26679180).

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

20009364 is a wasteful number, since it uses less digits than its factorization.

20009364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667454 (or 1667452 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20009364 is about 4473.1827595125. The cubic root of 20009364 is about 271.4841180607.

Adding to 20009364 its reverse (46390002), we get a palindrome (66399366).

The spelling of 20009364 in words is "twenty million, nine thousand, three hundred sixty-four".