20976087 has 8 divisors (see below), whose sum is σ = 30510720. Its totient is φ = 12712760.

The previous prime is 20976061. The next prime is 20976089. The reversal of 20976087 is 78067902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20976087 - 2¹⁰ = 20975063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317787 + ... + 317852.

It is an arithmetic number, because the mean of its divisors is an integer number (3813840).

Almost surely, 2^20976087 is an apocalyptic number.

20976087 is a deficient number, since it is larger than the sum of its proper divisors (9534633).

20976087 is a wasteful number, since it uses less digits than its factorization.

20976087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635653.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 20976087 is about 4579.9658295669. The cubic root of 20976087 is about 275.7876569848.

The spelling of 20976087 in words is "twenty million, nine hundred seventy-six thousand, eighty-seven".