21677435573463 has 12 divisors (see below), whose sum is σ = 32321911106368. Its totient is φ = 13985442305280.

The previous prime is 21677435573449. The next prime is 21677435573473. The reversal of 21677435573463 is 36437553477612.

21677435573463 is a `hidden beast` number, since 2 + 1 + 6 + 7 + 7 + 43 + 557 + 34 + 6 + 3 = 666.

It is not a de Polignac number, because 21677435573463 - 2⁹ = 21677435572951 is a prime.

It is a super-2 number, since 2×21677435573463² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21677435573463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21677435573473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38848450570 + ... + 38848451127.

Almost surely, 2^{21677435573463} is an apocalyptic number.

21677435573463 is a deficient number, since it is larger than the sum of its proper divisors (10644475532905).

21677435573463 is a wasteful number, since it uses less digits than its factorization.

21677435573463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77696901734 (or 77696901731 counting only the distinct ones).

The product of its digits is 266716800, while the sum is 63.

The spelling of 21677435573463 in words is "twenty-one trillion, six hundred seventy-seven billion, four hundred thirty-five million, five hundred seventy-three thousand, four hundred sixty-three".