21477545253522 has 12 divisors (see below), whose sum is σ = 46534681382670. Its totient is φ = 7159181751168.

The previous prime is 21477545253503. The next prime is 21477545253539. The reversal of 21477545253522 is 22535254577412.

21477545253522 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 7 + 54 + 52 + 535 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14641574197761 + 6835971055761 = 3826431^2 + 2614569^2 .

It is a super-2 number, since 2×21477545253522² (a number of 27 digits) contains 22 as substring.

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 in 5 ways as a sum of consecutive naturals, for example, 596598479247 + ... + 596598479282.

Almost surely, 2^{21477545253522} is an apocalyptic number.

21477545253522 is an abundant number, since it is smaller than the sum of its proper divisors (25057136129148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477545253522 is a wasteful number, since it uses less digits than its factorization.

21477545253522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193196958537 (or 1193196958534 counting only the distinct ones).

The product of its digits is 23520000, while the sum is 54.

The spelling of 21477545253522 in words is "twenty-one trillion, four hundred seventy-seven billion, five hundred forty-five million, two hundred fifty-three thousand, five hundred twenty-two".