20204013400 has 72 divisors (see below), whose sum is σ = 47878693380. Its totient is φ = 7928901760.

The previous prime is 20204013397. The next prime is 20204013463. The reversal of 20204013400 is 431040202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 543819 + ... + 579781.

Almost surely, 2^20204013400 is an apocalyptic number.

20204013400 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 20204013400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23939346690).

20204013400 is an abundant number, since it is smaller than the sum of its proper divisors (27674679980).

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

20204013400 is a wasteful number, since it uses less digits than its factorization.

20204013400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36085 (or 36023 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20204013400 its reverse (431040202), we get a palindrome (20635053602).

The spelling of 20204013400 in words is "twenty billion, two hundred four million, thirteen thousand, four hundred".