21653436460342 has 8 divisors (see below), whose sum is σ = 32480943914232. Its totient is φ = 10826455155600.

The previous prime is 21653436460339. The next prime is 21653436460363. The reversal of 21653436460342 is 24306463435612.

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, 131434384 + ... + 131599027.

It is an arithmetic number, because the mean of its divisors is an integer number (4060117989279).

Almost surely, 2^{21653436460342} is an apocalyptic number.

21653436460342 is a deficient number, since it is larger than the sum of its proper divisors (10827507453890).

21653436460342 is a wasteful number, since it uses less digits than its factorization.

21653436460342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263074574.

The product of its (nonzero) digits is 7464960, while the sum is 49.

Adding to 21653436460342 its reverse (24306463435612), we get a palindrome (45959899895954).

The spelling of 21653436460342 in words is "twenty-one trillion, six hundred fifty-three billion, four hundred thirty-six million, four hundred sixty thousand, three hundred forty-two".