20120000 has 70 divisors (see below), whose sum is σ = 49990248. Its totient is φ = 8032000.

The previous prime is 20119991. The next prime is 20120029. The reversal of 20120000 is 2102.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39749 + ... + 40251.

Almost surely, 2^20120000 is an apocalyptic number.

20120000 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 20120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24995124).

20120000 is an abundant number, since it is smaller than the sum of its proper divisors (29870248).

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

20120000 is an frugal number, since it uses more digits than its factorization.

20120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 20120000 is about 4485.5322984012. The cubic root of 20120000 is about 271.9835630206.

Adding to 20120000 its reverse (2102), we get a palindrome (20122102).

The spelling of 20120000 in words is "twenty million, one hundred twenty thousand".