20345206 has 16 divisors (see below), whose sum is σ = 35470080. Its totient is φ = 8571240.

The previous prime is 20345167. The next prime is 20345231. The reversal of 20345206 is 60254302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11490 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (2216880).

Almost surely, 2^20345206 is an apocalyptic number.

20345206 is a deficient number, since it is larger than the sum of its proper divisors (15124874).

20345206 is a wasteful number, since it uses less digits than its factorization.

20345206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24699.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20345206 is about 4510.5660398668. The cubic root of 20345206 is about 272.9945836564.

Adding to 20345206 its reverse (60254302), we get a palindrome (80599508).

The spelling of 20345206 in words is "twenty million, three hundred forty-five thousand, two hundred six".