20087973 has 16 divisors (see below), whose sum is σ = 29866560. Its totient is φ = 13344048.

The previous prime is 20087953. The next prime is 20087989. The reversal of 20087973 is 37978002.

It is not a de Polignac number, because 20087973 - 2⁹ = 20087461 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20087953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7386 + ... + 9732.

It is an arithmetic number, because the mean of its divisors is an integer number (1866660).

Almost surely, 2^20087973 is an apocalyptic number.

It is an amenable number.

20087973 is a deficient number, since it is larger than the sum of its proper divisors (9778587).

20087973 is a wasteful number, since it uses less digits than its factorization.

20087973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673 (or 2667 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20087973 is about 4481.9608432024. The cubic root of 20087973 is about 271.8391719732.

The spelling of 20087973 in words is "twenty million, eighty-seven thousand, nine hundred seventy-three".