20423102234 has 16 divisors (see below), whose sum is σ = 30914172072. Its totient is φ = 10118427648.

The previous prime is 20423102221. The next prime is 20423102291. The reversal of 20423102234 is 43220132402.

It can be written as a sum of positive squares in 4 ways, for example, as 13456696009 + 6966406225 = 116003^2 + 83465^2 .

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, 1005362 + ... + 1025474.

Almost surely, 2^20423102234 is an apocalyptic number.

20423102234 is a deficient number, since it is larger than the sum of its proper divisors (10491069838).

20423102234 is a wasteful number, since it uses less digits than its factorization.

20423102234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24721.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20423102234 its reverse (43220132402), we get a palindrome (63643234636).

The spelling of 20423102234 in words is "twenty billion, four hundred twenty-three million, one hundred two thousand, two hundred thirty-four".