21471353740366 has 16 divisors (see below), whose sum is σ = 32446792869120. Its totient is φ = 10655794484280.

The previous prime is 21471353740321. The next prime is 21471353740453. The reversal of 21471353740366 is 66304735317412.

It is a super-2 number, since 2×21471353740366² (a number of 27 digits) contains 22 as substring.

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, 8470150 + ... + 10709161.

It is an arithmetic number, because the mean of its divisors is an integer number (2027924554320).

Almost surely, 2^{21471353740366} is an apocalyptic number.

21471353740366 is a deficient number, since it is larger than the sum of its proper divisors (10975439128754).

21471353740366 is a wasteful number, since it uses less digits than its factorization.

21471353740366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19183479.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 21471353740366 in words is "twenty-one trillion, four hundred seventy-one billion, three hundred fifty-three million, seven hundred forty thousand, three hundred sixty-six".