20015364 has 12 divisors (see below), whose sum is σ = 46702544. Its totient is φ = 6671784.

The previous prime is 20015363. The next prime is 20015371. The reversal of 20015364 is 46351002.

It is a happy number.

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

It is a super-2 number, since 2×20015364² = 801229592104992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20015364.

It is not an unprimeable number, because it can be changed into a prime (20015363) 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, 833962 + ... + 833985.

Almost surely, 2^20015364 is an apocalyptic number.

It is an amenable number.

20015364 is an abundant number, since it is smaller than the sum of its proper divisors (26687180).

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

20015364 is a wasteful number, since it uses less digits than its factorization.

20015364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667954 (or 1667952 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20015364 is about 4473.8533726532. The cubic root of 20015364 is about 271.5112510557.

Adding to 20015364 its reverse (46351002), we get a palindrome (66366366).

The spelling of 20015364 in words is "twenty million, fifteen thousand, three hundred sixty-four".