21354742540604 has 24 divisors (see below), whose sum is σ = 40814314963968. Its totient is φ = 9695708270640.

The previous prime is 21354742540597. The next prime is 21354742540661. The reversal of 21354742540604 is 40604524745312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274782812 + ... + 274860515.

It is an arithmetic number, because the mean of its divisors is an integer number (1700596456832).

Almost surely, 2^{21354742540604} is an apocalyptic number.

It is an amenable number.

21354742540604 is a deficient number, since it is larger than the sum of its proper divisors (19459572423364).

21354742540604 is a wasteful number, since it uses less digits than its factorization.

21354742540604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549644225 (or 549644223 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 47.

The spelling of 21354742540604 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-two million, five hundred forty thousand, six hundred four".