20015973 has 12 divisors (see below), whose sum is σ = 28978560. Its totient is φ = 13313256.

The previous prime is 20015923. The next prime is 20015977. The reversal of 20015973 is 37951002.

It is not a de Polignac number, because 20015973 - 2⁶ = 20015909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1990 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (2414880).

Almost surely, 2^20015973 is an apocalyptic number.

It is an amenable number.

20015973 is a deficient number, since it is larger than the sum of its proper divisors (8962587).

20015973 is a wasteful number, since it uses less digits than its factorization.

20015973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128 (or 5125 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20015973 is about 4473.9214342677. The cubic root of 20015973 is about 271.5140047516.

Adding to 20015973 its reverse (37951002), we get a palindrome (57966975).

The spelling of 20015973 in words is "twenty million, fifteen thousand, nine hundred seventy-three".