23151200400020 has 192 divisors, whose sum is σ = 63931153305600. Its totient is φ = 6822576138240.

The previous prime is 23151200399989. The next prime is 23151200400023. The reversal of 23151200400020 is 2000400215132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23151200399965 and 23151200400001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23151200400023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13931276 + ... + 15504284.

It is an arithmetic number, because the mean of its divisors is an integer number (332974756800).

Almost surely, 2^{23151200400020} is an apocalyptic number.

23151200400020 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 23151200400020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31965576652800).

23151200400020 is an abundant number, since it is smaller than the sum of its proper divisors (40779952905580).

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

23151200400020 is a wasteful number, since it uses less digits than its factorization.

23151200400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573558 (or 1573556 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 23151200400020 its reverse (2000400215132), we get a palindrome (25151600615152).

The spelling of 23151200400020 in words is "twenty-three trillion, one hundred fifty-one billion, two hundred million, four hundred thousand, twenty".