21264035256146 has 16 divisors (see below), whose sum is σ = 32929295912448. Its totient is φ = 10287693662400.

The previous prime is 21264035256133. The next prime is 21264035256179. The reversal of 21264035256146 is 64165253046212.

It is a self number, because there is not a number n which added to its sum of digits gives 21264035256146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22119815 + ... + 23061098.

It is an arithmetic number, because the mean of its divisors is an integer number (2058080994528).

Almost surely, 2^{21264035256146} is an apocalyptic number.

21264035256146 is a deficient number, since it is larger than the sum of its proper divisors (11665260656302).

21264035256146 is a wasteful number, since it uses less digits than its factorization.

21264035256146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45188537.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 21264035256146 in words is "twenty-one trillion, two hundred sixty-four billion, thirty-five million, two hundred fifty-six thousand, one hundred forty-six".