20787153 has 8 divisors (see below), whose sum is σ = 28170816. Its totient is φ = 13630800.

The previous prime is 20787149. The next prime is 20787157. The reversal of 20787153 is 35178702.

It is an interprime number because it is at equal distance from previous prime (20787149) and next prime (20787157).

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

It is not a de Polignac number, because 20787153 - 2² = 20787149 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20787157) 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, 56613 + ... + 56978.

It is an arithmetic number, because the mean of its divisors is an integer number (3521352).

Almost surely, 2^20787153 is an apocalyptic number.

It is an amenable number.

20787153 is a deficient number, since it is larger than the sum of its proper divisors (7383663).

20787153 is a wasteful number, since it uses less digits than its factorization.

20787153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113655.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 20787153 is about 4559.2930373030. The cubic root of 20787153 is about 274.9571415303.

The spelling of 20787153 in words is "twenty million, seven hundred eighty-seven thousand, one hundred fifty-three".