20898452400 has 480 divisors, whose sum is σ = 78894379008. Its totient is φ = 4630348800.

The previous prime is 20898452387. The next prime is 20898452447. The reversal of 20898452400 is 425489802.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39958539 + ... + 39959061.

Almost surely, 2^20898452400 is an apocalyptic number.

20898452400 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 20898452400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39447189504).

20898452400 is an abundant number, since it is smaller than the sum of its proper divisors (57995926608).

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

20898452400 is a wasteful number, since it uses less digits than its factorization.

20898452400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 20898452400 in words is "twenty billion, eight hundred ninety-eight million, four hundred fifty-two thousand, four hundred".