20123211134 has 16 divisors (see below), whose sum is σ = 34418886768. Its totient is φ = 8741304192.

The previous prime is 20123211103. The next prime is 20123211181. The reversal of 20123211134 is 43111232102.

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, 22763372 + ... + 22764255.

It is an arithmetic number, because the mean of its divisors is an integer number (2151180423).

Almost surely, 2^20123211134 is an apocalyptic number.

20123211134 is a deficient number, since it is larger than the sum of its proper divisors (14295675634).

20123211134 is a wasteful number, since it uses less digits than its factorization.

20123211134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45527659.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20123211134 its reverse (43111232102), we get a palindrome (63234443236).

The spelling of 20123211134 in words is "twenty billion, one hundred twenty-three million, two hundred eleven thousand, one hundred thirty-four".