21465233256412 has 12 divisors (see below), whose sum is σ = 40979081671416. Its totient is φ = 9756924207440.

The previous prime is 21465233256407. The next prime is 21465233256437.

It is a happy number.

21465233256412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21465233256412² (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 3 ways as a sum of consecutive naturals, for example, 243923105143 + ... + 243923105230.

It is an arithmetic number, because the mean of its divisors is an integer number (3414923472618).

Almost surely, 2^{21465233256412} is an apocalyptic number.

21465233256412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21465233256412 is a deficient number, since it is larger than the sum of its proper divisors (19513848415004).

21465233256412 is a wasteful number, since it uses less digits than its factorization.

21465233256412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487846210388 (or 487846210386 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 21465233256412 in words is "twenty-one trillion, four hundred sixty-five billion, two hundred thirty-three million, two hundred fifty-six thousand, four hundred twelve".