20230220400 has 240 divisors, whose sum is σ = 72824672256. Its totient is φ = 4763151360.

The previous prime is 20230220347. The next prime is 20230220407. The reversal of 20230220400 is 402203202.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20230220400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230220407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330609 + ... + 386991.

Almost surely, 2^20230220400 is an apocalyptic number.

20230220400 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 20230220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36412336128).

20230220400 is an abundant number, since it is smaller than the sum of its proper divisors (52594451856).

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

20230220400 is a wasteful number, since it uses less digits than its factorization.

20230220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56440 (or 56429 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20230220400 its reverse (402203202), we get a palindrome (20632423602).

The spelling of 20230220400 in words is "twenty billion, two hundred thirty million, two hundred twenty thousand, four hundred".