20213304400 has 60 divisors (see below), whose sum is σ = 48992329692. Its totient is φ = 8013752320.

The previous prime is 20213304373. The next prime is 20213304431. The reversal of 20213304400 is 440331202.

It can be written as a sum of positive squares in 6 ways, for example, as 10837642816 + 9375661584 = 104104^2 + 96828^2 .

It is a super-3 number, since 3×20213304400³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178399 + ... + 268798.

Almost surely, 2^20213304400 is an apocalyptic number.

20213304400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213304400 is an abundant number, since it is smaller than the sum of its proper divisors (28779025292).

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

20213304400 is a wasteful number, since it uses less digits than its factorization.

20213304400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447328 (or 447317 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20213304400 its reverse (440331202), we get a palindrome (20653635602).

The spelling of 20213304400 in words is "twenty billion, two hundred thirteen million, three hundred four thousand, four hundred".