21034121432 has 32 divisors (see below), whose sum is σ = 40422624480. Its totient is φ = 10255031040.

The previous prime is 21034121417. The next prime is 21034121491. The reversal of 21034121432 is 23412143012.

It is a super-2 number, since 2×21034121432² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21034121398 and 21034121407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630893 + ... + 663395.

It is an arithmetic number, because the mean of its divisors is an integer number (1263207015).

Almost surely, 2^21034121432 is an apocalyptic number.

It is an amenable number.

21034121432 is a deficient number, since it is larger than the sum of its proper divisors (19388503048).

21034121432 is a wasteful number, since it uses less digits than its factorization.

21034121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34523 (or 34519 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21034121432 its reverse (23412143012), we get a palindrome (44446264444).

The spelling of 21034121432 in words is "twenty-one billion, thirty-four million, one hundred twenty-one thousand, four hundred thirty-two".