23403215221400 has 192 divisors, whose sum is σ = 62473337164800. Its totient is φ = 7986873000960.

The previous prime is 23403215221277. The next prime is 23403215221403. The reversal of 23403215221400 is 412251230432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23403215221403) 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, 827451659 + ... + 827479941.

It is an arithmetic number, because the mean of its divisors is an integer number (325381964400).

Almost surely, 2^{23403215221400} is an apocalyptic number.

23403215221400 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 23403215221400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31236668582400).

23403215221400 is an abundant number, since it is smaller than the sum of its proper divisors (39070121943400).

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

23403215221400 is a wasteful number, since it uses less digits than its factorization.

23403215221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31018 (or 31009 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 23403215221400 its reverse (412251230432), we get a palindrome (23815466451832).

The spelling of 23403215221400 in words is "twenty-three trillion, four hundred three billion, two hundred fifteen million, two hundred twenty-one thousand, four hundred".