20131234000 has 40 divisors (see below), whose sum is σ = 48677328648. Its totient is φ = 8052492800.

The previous prime is 20131233973. The next prime is 20131234001. The reversal of 20131234000 is 43213102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1492431424 + 18638802576 = 38632^2 + 136524^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131234001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5030809 + ... + 5034808.

Almost surely, 2^20131234000 is an apocalyptic number.

20131234000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131234000 is an abundant number, since it is smaller than the sum of its proper divisors (28546094648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20131234000 is a wasteful number, since it uses less digits than its factorization.

20131234000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10065640 (or 10065624 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20131234000 its reverse (43213102), we get a palindrome (20174447102).

The spelling of 20131234000 in words is "twenty billion, one hundred thirty-one million, two hundred thirty-four thousand".