20120403000 has 128 divisors (see below), whose sum is σ = 64940616000. Its totient is φ = 5180403200.

The previous prime is 20120402999. The next prime is 20120403071. The reversal of 20120403000 is 30402102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28635 + ... + 202634.

Almost surely, 2^20120403000 is an apocalyptic number.

20120403000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120403000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32470308000).

20120403000 is an abundant number, since it is smaller than the sum of its proper divisors (44820213000).

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

20120403000 is a wasteful number, since it uses less digits than its factorization.

20120403000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231322 (or 231308 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20120403000 its reverse (30402102), we get a palindrome (20150805102).

The spelling of 20120403000 in words is "twenty billion, one hundred twenty million, four hundred three thousand".