21234628644311 has 8 divisors (see below), whose sum is σ = 21388438727040. Its totient is φ = 21080833461432.

The previous prime is 21234628644287. The next prime is 21234628644377. The reversal of 21234628644311 is 11344682643212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234628644311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234628644511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856355 + ... + 6572868.

It is an arithmetic number, because the mean of its divisors is an integer number (2673554840880).

Almost surely, 2^{21234628644311} is an apocalyptic number.

21234628644311 is a deficient number, since it is larger than the sum of its proper divisors (153810082729).

21234628644311 is a wasteful number, since it uses less digits than its factorization.

21234628644311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7449925.

The product of its digits is 1327104, while the sum is 47.

The spelling of 21234628644311 in words is "twenty-one trillion, two hundred thirty-four billion, six hundred twenty-eight million, six hundred forty-four thousand, three hundred eleven".