21120644420462 has 4 divisors (see below), whose sum is σ = 31680966630696. Its totient is φ = 10560322210230.

The previous prime is 21120644420453. The next prime is 21120644420489. The reversal of 21120644420462 is 26402444602112.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21120644420462² (a number of 27 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280161105114 + ... + 5280161105117.

It is an arithmetic number, because the mean of its divisors is an integer number (7920241657674).

Almost surely, 2^{21120644420462} is an apocalyptic number.

21120644420462 is a deficient number, since it is larger than the sum of its proper divisors (10560322210234).

21120644420462 is a wasteful number, since it uses less digits than its factorization.

21120644420462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560322210233.

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 21120644420462 in words is "twenty-one trillion, one hundred twenty billion, six hundred forty-four million, four hundred twenty thousand, four hundred sixty-two".