20301987 has 8 divisors (see below), whose sum is σ = 27276480. Its totient is φ = 13431080.

The previous prime is 20301949. The next prime is 20301991. The reversal of 20301987 is 78910302.

It is a happy number.

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 20301987 - 2⁸ = 20301731 is a prime.

It is a super-2 number, since 2×20301987² = 824341352296338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20301997) 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, 25437 + ... + 26222.

It is an arithmetic number, because the mean of its divisors is an integer number (3409560).

Almost surely, 2^20301987 is an apocalyptic number.

20301987 is a deficient number, since it is larger than the sum of its proper divisors (6974493).

20301987 is a wasteful number, since it uses less digits than its factorization.

20301987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51793.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20301987 is about 4505.7726307482. The cubic root of 20301987 is about 272.8011405871.

The spelling of 20301987 in words is "twenty million, three hundred one thousand, nine hundred eighty-seven".