20271234 has 16 divisors (see below), whose sum is σ = 42305472. Its totient is φ = 6463248.

The previous prime is 20271197. The next prime is 20271239. The reversal of 20271234 is 43217202.

It is a self number, because there is not a number n which added to its sum of digits gives 20271234.

It is not an unprimeable number, because it can be changed into a prime (20271239) 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, 73309 + ... + 73584.

It is an arithmetic number, because the mean of its divisors is an integer number (2644092).

Almost surely, 2^20271234 is an apocalyptic number.

20271234 is an abundant number, since it is smaller than the sum of its proper divisors (22034238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20271234 is a wasteful number, since it uses less digits than its factorization.

20271234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146921.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20271234 is about 4502.3587151625. The cubic root of 20271234 is about 272.6633266037.

Adding to 20271234 its reverse (43217202), we get a palindrome (63488436).

The spelling of 20271234 in words is "twenty million, two hundred seventy-one thousand, two hundred thirty-four".