20954087 has 8 divisors (see below), whose sum is σ = 26124672. Its totient is φ = 16327800.

The previous prime is 20954083. The next prime is 20954107. The reversal of 20954087 is 78045902.

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 20954087 - 2² = 20954083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135989 + ... + 136142.

It is an arithmetic number, because the mean of its divisors is an integer number (3265584).

Almost surely, 2^20954087 is an apocalyptic number.

20954087 is a deficient number, since it is larger than the sum of its proper divisors (5170585).

20954087 is a wasteful number, since it uses less digits than its factorization.

20954087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272149.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20954087 is about 4577.5634348417. The cubic root of 20954087 is about 275.6912066657.

Adding to 20954087 its reverse (78045902), we get a palindrome (98999989).

The spelling of 20954087 in words is "twenty million, nine hundred fifty-four thousand, eighty-seven".