21023111432304 has 200 divisors, whose sum is σ = 62951860287360. Its totient is φ = 6765338184192.

The previous prime is 21023111432269. The next prime is 21023111432383. The reversal of 21023111432304 is 40323411132012.

21023111432304 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 311 + 1 + 43 + 2 + 304 = 666.

It is a super-2 number, since 2×21023111432304² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 438844417 + ... + 438892319.

Almost surely, 2^{21023111432304} is an apocalyptic number.

21023111432304 is a gapful number since it is divisible by the number (24) 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 21023111432304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31475930143680).

21023111432304 is an abundant number, since it is smaller than the sum of its proper divisors (41928748855056).

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

21023111432304 is a wasteful number, since it uses less digits than its factorization.

21023111432304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59629 (or 59614 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21023111432304 its reverse (40323411132012), we get a palindrome (61346522564316).

The spelling of 21023111432304 in words is "twenty-one trillion, twenty-three billion, one hundred eleven million, four hundred thirty-two thousand, three hundred four".