21354742540603 has 4 divisors (see below), whose sum is σ = 21474042778440. Its totient is φ = 21235442302768.

The previous prime is 21354742540597. The next prime is 21354742540661. The reversal of 21354742540603 is 30604524745312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21354742540603 is a prime.

It is a super-2 number, since 2×21354742540603² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354742540303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59650118650 + ... + 59650119007.

It is an arithmetic number, because the mean of its divisors is an integer number (5368510694610).

Almost surely, 2^{21354742540603} is an apocalyptic number.

21354742540603 is a deficient number, since it is larger than the sum of its proper divisors (119300237837).

21354742540603 is a wasteful number, since it uses less digits than its factorization.

21354742540603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119300237836.

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 21354742540603 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-two million, five hundred forty thousand, six hundred three".