21034234332 has 48 divisors (see below), whose sum is σ = 55347147520. Its totient is φ = 6906761136.

The previous prime is 21034234307. The next prime is 21034234393. The reversal of 21034234332 is 23343243012.

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 = 21034234296 and 21034234305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446208 + ... + 1460679.

Almost surely, 2^21034234332 is an apocalyptic number.

It is an amenable number.

21034234332 is an abundant number, since it is smaller than the sum of its proper divisors (34312913188).

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

21034234332 is a wasteful number, since it uses less digits than its factorization.

21034234332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906967 (or 2906959 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21034234332 its reverse (23343243012), we get a palindrome (44377477344).

The spelling of 21034234332 in words is "twenty-one billion, thirty-four million, two hundred thirty-four thousand, three hundred thirty-two".