21530400353342 has 8 divisors (see below), whose sum is σ = 32361915932976. Its totient is φ = 10743095042352.

The previous prime is 21530400353299. The next prime is 21530400353431. The reversal of 21530400353342 is 24335300403512.

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

It is a congruent 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, 11052565943 + ... + 11052567890.

It is an arithmetic number, because the mean of its divisors is an integer number (4045239491622).

Almost surely, 2^{21530400353342} is an apocalyptic number.

21530400353342 is a deficient number, since it is larger than the sum of its proper divisors (10831515579634).

21530400353342 is a wasteful number, since it uses less digits than its factorization.

21530400353342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22105134322.

The product of its (nonzero) digits is 129600, while the sum is 35.

Adding to 21530400353342 its reverse (24335300403512), we get a palindrome (45865700756854).

The spelling of 21530400353342 in words is "twenty-one trillion, five hundred thirty billion, four hundred million, three hundred fifty-three thousand, three hundred forty-two".