21364767054142 has 16 divisors (see below), whose sum is σ = 32079854165040. Its totient is φ = 10671487725888.

The previous prime is 21364767054107. The next prime is 21364767054143. The reversal of 21364767054142 is 24145076746312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21364767054142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364767054143) 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, 6588093 + ... + 9280759.

It is an arithmetic number, because the mean of its divisors is an integer number (2004990885315).

Almost surely, 2^{21364767054142} is an apocalyptic number.

21364767054142 is a deficient number, since it is larger than the sum of its proper divisors (10715087110898).

21364767054142 is a wasteful number, since it uses less digits than its factorization.

21364767054142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696715.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 21364767054142 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-seven million, fifty-four thousand, one hundred forty-two".