20610345 has 32 divisors (see below), whose sum is σ = 39674880. Its totient is φ = 8925120.

The previous prime is 20610313. The next prime is 20610347. The reversal of 20610345 is 54301602.

It is a happy number.

It is not a de Polignac number, because 20610345 - 2⁵ = 20610313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20610347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3171 + ... + 7160.

It is an arithmetic number, because the mean of its divisors is an integer number (1239840).

Almost surely, 2^20610345 is an apocalyptic number.

It is an amenable number.

20610345 is a deficient number, since it is larger than the sum of its proper divisors (19064535).

20610345 is a wasteful number, since it uses less digits than its factorization.

20610345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20610345 is about 4539.8617820370. The cubic root of 20610345 is about 274.1753588254.

Adding to 20610345 its reverse (54301602), we get a palindrome (74911947).

The spelling of 20610345 in words is "twenty million, six hundred ten thousand, three hundred forty-five".