20209270 has 16 divisors (see below), whose sum is σ = 36994320. Its totient is φ = 7946464.

The previous prime is 20209253. The next prime is 20209291. The reversal of 20209270 is 7290202.

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, 16537 + ... + 17716.

It is an arithmetic number, because the mean of its divisors is an integer number (2312145).

Almost surely, 2^20209270 is an apocalyptic number.

20209270 is a deficient number, since it is larger than the sum of its proper divisors (16785050).

20209270 is a wasteful number, since it uses less digits than its factorization.

20209270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34319.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20209270 is about 4495.4721665249. The cubic root of 20209270 is about 272.3852222622.

Adding to 20209270 its reverse (7290202), we get a palindrome (27499472).

The spelling of 20209270 in words is "twenty million, two hundred nine thousand, two hundred seventy".