21477564367353 has 8 divisors (see below), whose sum is σ = 31818613877600. Its totient is φ = 14318376244884.

The previous prime is 21477564367289. The next prime is 21477564367373. The reversal of 21477564367353 is 35376346577412.

21477564367353 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 7 + 564 + 3 + 67 + 3 + 5 + 3 = 666.

It is not a de Polignac number, because 21477564367353 - 2⁶ = 21477564367289 is a prime.

It is a super-2 number, since 2×21477564367353² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21477564367373) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 397732673443 + ... + 397732673496.

It is an arithmetic number, because the mean of its divisors is an integer number (3977326734700).

Almost surely, 2^{21477564367353} is an apocalyptic number.

It is an amenable number.

21477564367353 is a deficient number, since it is larger than the sum of its proper divisors (10341049510247).

21477564367353 is an equidigital number, since it uses as much as digits as its factorization.

21477564367353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795465346948 (or 795465346942 counting only the distinct ones).

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

The spelling of 21477564367353 in words is "twenty-one trillion, four hundred seventy-seven billion, five hundred sixty-four million, three hundred sixty-seven thousand, three hundred fifty-three".