20504321234 has 4 divisors (see below), whose sum is σ = 30756481854. Its totient is φ = 10252160616.

The previous prime is 20504321209. The next prime is 20504321237. The reversal of 20504321234 is 43212340502.

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., 13281871009 + 7222450225 = 115247^2 + 84985^2 .

It is not an unprimeable number, because it can be changed into a prime (20504321237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5126080307 + ... + 5126080310.

Almost surely, 2^20504321234 is an apocalyptic number.

20504321234 is a deficient number, since it is larger than the sum of its proper divisors (10252160620).

20504321234 is a wasteful number, since it uses less digits than its factorization.

20504321234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252160619.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20504321234 its reverse (43212340502), we get a palindrome (63716661736).

The spelling of 20504321234 in words is "twenty billion, five hundred four million, three hundred twenty-one thousand, two hundred thirty-four".