21234132474 has 8 divisors (see below), whose sum is σ = 42468264960. Its totient is φ = 7078044156.

The previous prime is 21234132463. The next prime is 21234132487. The reversal of 21234132474 is 47423143212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21234132474 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769511034 + ... + 1769511045.

It is an arithmetic number, because the mean of its divisors is an integer number (5308533120).

Almost surely, 2^21234132474 is an apocalyptic number.

21234132474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21234132474 is a wasteful number, since it uses less digits than its factorization.

21234132474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539022084.

The product of its digits is 32256, while the sum is 33.

Adding to 21234132474 its reverse (47423143212), we get a palindrome (68657275686).

The spelling of 21234132474 in words is "twenty-one billion, two hundred thirty-four million, one hundred thirty-two thousand, four hundred seventy-four".