20380512 has 24 divisors (see below), whose sum is σ = 53499096. Its totient is φ = 6793472.

The previous prime is 20380489. The next prime is 20380537. The reversal of 20380512 is 21508302.

It is a tau number, because it is divible by the number of its divisors (24).

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, 106053 + ... + 106244.

It is an arithmetic number, because the mean of its divisors is an integer number (2229129).

Almost surely, 2^20380512 is an apocalyptic number.

It is an amenable number.

20380512 is an abundant number, since it is smaller than the sum of its proper divisors (33118584).

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

20380512 is a wasteful number, since it uses less digits than its factorization.

20380512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212310 (or 212302 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20380512 is about 4514.4780429192. The cubic root of 20380512 is about 273.1524058782.

Adding to 20380512 its reverse (21508302), we get a palindrome (41888814).

The spelling of 20380512 in words is "twenty million, three hundred eighty thousand, five hundred twelve".