21530434412332 has 6 divisors (see below), whose sum is σ = 37678260221588. Its totient is φ = 10765217206164.

The previous prime is 21530434412329. The next prime is 21530434412339. The reversal of 21530434412332 is 23321443403512.

It is a junction number, because it is equal to n+sod(n) for n = 21530434412291 and 21530434412300.

It is not an unprimeable number, because it can be changed into a prime (21530434412339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2691304301538 + ... + 2691304301545.

Almost surely, 2^{21530434412332} is an apocalyptic number.

It is an amenable number.

21530434412332 is a deficient number, since it is larger than the sum of its proper divisors (16147825809256).

21530434412332 is a wasteful number, since it uses less digits than its factorization.

21530434412332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382608603087 (or 5382608603085 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 21530434412332 its reverse (23321443403512), we get a palindrome (44851877815844).

The spelling of 21530434412332 in words is "twenty-one trillion, five hundred thirty billion, four hundred thirty-four million, four hundred twelve thousand, three hundred thirty-two".