20401401200 has 120 divisors (see below), whose sum is σ = 49958792016. Its totient is φ = 8004096000.

The previous prime is 20401401187. The next prime is 20401401253. The reversal of 20401401200 is 210410402.

It is a super-2 number, since 2×20401401200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10564235 + ... + 10566165.

Almost surely, 2^20401401200 is an apocalyptic number.

20401401200 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 20401401200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24979396008).

20401401200 is an abundant number, since it is smaller than the sum of its proper divisors (29557390816).

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

20401401200 is a wasteful number, since it uses less digits than its factorization.

20401401200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2432 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20401401200 its reverse (210410402), we get a palindrome (20611811602).

The spelling of 20401401200 in words is "twenty billion, four hundred one million, four hundred one thousand, two hundred".