21404607002311 has 16 divisors (see below), whose sum is σ = 24058112762880. Its totient is φ = 18895299112800.

The previous prime is 21404607002309. The next prime is 21404607002321. The reversal of 21404607002311 is 11320070640412.

It is a cyclic number.

It is not a de Polignac number, because 21404607002311 - 2¹ = 21404607002309 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 (21404607002321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5596665 + ... + 8609986.

It is an arithmetic number, because the mean of its divisors is an integer number (1503632047680).

Almost surely, 2^{21404607002311} is an apocalyptic number.

21404607002311 is a deficient number, since it is larger than the sum of its proper divisors (2653505760569).

21404607002311 is a wasteful number, since it uses less digits than its factorization.

21404607002311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14211726.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 21404607002311 its reverse (11320070640412), we get a palindrome (32724677642723).

The spelling of 21404607002311 in words is "twenty-one trillion, four hundred four billion, six hundred seven million, two thousand, three hundred eleven".