20213234 has 4 divisors (see below), whose sum is σ = 30319854. Its totient is φ = 10106616.

The previous prime is 20213233. The next prime is 20213257. The reversal of 20213234 is 43231202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10259209 + 9954025 = 3203^2 + 3155^2 .

It is not an unprimeable number, because it can be changed into a prime (20213233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053307 + ... + 5053310.

Almost surely, 2^20213234 is an apocalyptic number.

20213234 is a deficient number, since it is larger than the sum of its proper divisors (10106620).

20213234 is a wasteful number, since it uses less digits than its factorization.

20213234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106619.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20213234 is about 4495.9130329667. The cubic root of 20213234 is about 272.4030303347.

Adding to 20213234 its reverse (43231202), we get a palindrome (63444436).

The spelling of 20213234 in words is "twenty million, two hundred thirteen thousand, two hundred thirty-four".