20400012134 has 8 divisors (see below), whose sum is σ = 30628017840. Its totient is φ = 10190672856.

The previous prime is 20400012119. The next prime is 20400012151. The reversal of 20400012134 is 43121000402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4663874 + ... + 4668245.

It is an arithmetic number, because the mean of its divisors is an integer number (3828502230).

Almost surely, 2^20400012134 is an apocalyptic number.

20400012134 is a deficient number, since it is larger than the sum of its proper divisors (10228005706).

20400012134 is a wasteful number, since it uses less digits than its factorization.

20400012134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9333214.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20400012134 its reverse (43121000402), we get a palindrome (63521012536).

The spelling of 20400012134 in words is "twenty billion, four hundred million, twelve thousand, one hundred thirty-four".