21032072334 has 288 divisors, whose sum is σ = 60681924576. Its totient is φ = 5408363520.

The previous prime is 21032072311. The next prime is 21032072371. The reversal of 21032072334 is 43327023012.

21032072334 is a `hidden beast` number, since 2 + 1 + 0 + 320 + 7 + 2 + 334 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21032072298 and 21032072307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12692034 + ... + 12693690.

It is an arithmetic number, because the mean of its divisors is an integer number (210701127).

Almost surely, 2^21032072334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21032072334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30340962288).

21032072334 is an abundant number, since it is smaller than the sum of its proper divisors (39649852242).

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

21032072334 is a wasteful number, since it uses less digits than its factorization.

21032072334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

Adding to 21032072334 its reverse (43327023012), we get a palindrome (64359095346).

The spelling of 21032072334 in words is "twenty-one billion, thirty-two million, seventy-two thousand, three hundred thirty-four".