20609755 has 8 divisors (see below), whose sum is σ = 24811632. Its totient is φ = 16434528.

The previous prime is 20609753. The next prime is 20609773. The reversal of 20609755 is 55790602.

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 20609755 - 2¹ = 20609753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20609755.

It is not an unprimeable number, because it can be changed into a prime (20609753) 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, 4917 + ... + 8086.

It is an arithmetic number, because the mean of its divisors is an integer number (3101454).

Almost surely, 2^20609755 is an apocalyptic number.

20609755 is a deficient number, since it is larger than the sum of its proper divisors (4201877).

20609755 is a wasteful number, since it uses less digits than its factorization.

20609755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13325.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 20609755 is about 4539.7968016201. The cubic root of 20609755 is about 274.1727425825.

The spelling of 20609755 in words is "twenty million, six hundred nine thousand, seven hundred fifty-five".