21323422402020 has 480 divisors, whose sum is σ = 73118810983680. Its totient is φ = 5183563714560.

The previous prime is 21323422402013. The next prime is 21323422402049. The reversal of 21323422402020 is 2020422432312.

21323422402020 is a `hidden beast` number, since 2 + 1 + 3 + 234 + 2 + 2 + 402 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 92008809 + ... + 92240271.

It is an arithmetic number, because the mean of its divisors is an integer number (152330856216).

Almost surely, 2^{21323422402020} is an apocalyptic number.

21323422402020 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 21323422402020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36559405491840).

21323422402020 is an abundant number, since it is smaller than the sum of its proper divisors (51795388581660).

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

21323422402020 is a wasteful number, since it uses less digits than its factorization.

21323422402020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231617 (or 231606 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21323422402020 its reverse (2020422432312), we get a palindrome (23343844834332).

The spelling of 21323422402020 in words is "twenty-one trillion, three hundred twenty-three billion, four hundred twenty-two million, four hundred two thousand, twenty".