20372855 has 8 divisors (see below), whose sum is σ = 24967872. Its totient is φ = 15951328.

The previous prime is 20372843. The next prime is 20372873. The reversal of 20372855 is 55827302.

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 20372855 - 2¹⁶ = 20307319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43112 + ... + 43581.

It is an arithmetic number, because the mean of its divisors is an integer number (3120984).

Almost surely, 2^20372855 is an apocalyptic number.

20372855 is a deficient number, since it is larger than the sum of its proper divisors (4595017).

20372855 is an equidigital number, since it uses as much as digits as its factorization.

20372855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86745.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 20372855 is about 4513.6299139384. The cubic root of 20372855 is about 273.1181936210.

The spelling of 20372855 in words is "twenty million, three hundred seventy-two thousand, eight hundred fifty-five".