21600340534 has 16 divisors (see below), whose sum is σ = 33258982176. Its totient is φ = 10515096000.

The previous prime is 21600340507. The next prime is 21600340547. The reversal of 21600340534 is 43504300612.

It is a super-2 number, since 2×21600340534² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230517 + ... + 310384.

It is an arithmetic number, because the mean of its divisors is an integer number (2078686386).

Almost surely, 2^21600340534 is an apocalyptic number.

21600340534 is a deficient number, since it is larger than the sum of its proper divisors (11658641642).

21600340534 is a wasteful number, since it uses less digits than its factorization.

21600340534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541431.

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 21600340534 in words is "twenty-one billion, six hundred million, three hundred forty thousand, five hundred thirty-four".