20151234000 has 160 divisors (see below), whose sum is σ = 72186391680. Its totient is φ = 5373648000.

The previous prime is 20151233983. The next prime is 20151234011. The reversal of 20151234000 is 43215102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132586 + ... + 240585.

It is an arithmetic number, because the mean of its divisors is an integer number (451164948).

Almost surely, 2^20151234000 is an apocalyptic number.

20151234000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20151234000 is an abundant number, since it is smaller than the sum of its proper divisors (52035157680).

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

20151234000 is a wasteful number, since it uses less digits than its factorization.

20151234000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373203 (or 373181 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20151234000 its reverse (43215102), we get a palindrome (20194449102).

The spelling of 20151234000 in words is "twenty billion, one hundred fifty-one million, two hundred thirty-four thousand".