21266667364346 has 16 divisors (see below), whose sum is σ = 33590100742560. Its totient is φ = 10070338859280.

The previous prime is 21266667364333. The next prime is 21266667364361. The reversal of 21266667364346 is 64346376666212.

It is a super-2 number, since 2×21266667364346² (a number of 27 digits) contains 22 as substring.

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, 92819681 + ... + 93048516.

It is an arithmetic number, because the mean of its divisors is an integer number (2099381296410).

Almost surely, 2^{21266667364346} is an apocalyptic number.

21266667364346 is a deficient number, since it is larger than the sum of its proper divisors (12323433378214).

21266667364346 is a wasteful number, since it uses less digits than its factorization.

21266667364346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185871229.

The product of its digits is 188116992, while the sum is 62.

The spelling of 21266667364346 in words is "twenty-one trillion, two hundred sixty-six billion, six hundred sixty-seven million, three hundred sixty-four thousand, three hundred forty-six".