21540412067306 has 8 divisors (see below), whose sum is σ = 35247947019264. Its totient is φ = 9791096394220.

The previous prime is 21540412067269. The next prime is 21540412067327. The reversal of 21540412067306 is 60376021404512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489554819690 + ... + 489554819733.

It is an arithmetic number, because the mean of its divisors is an integer number (4405993377408).

Almost surely, 2^{21540412067306} is an apocalyptic number.

21540412067306 is a deficient number, since it is larger than the sum of its proper divisors (13707534951958).

21540412067306 is a wasteful number, since it uses less digits than its factorization.

21540412067306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979109639436.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 21540412067306 in words is "twenty-one trillion, five hundred forty billion, four hundred twelve million, sixty-seven thousand, three hundred six".