21477600353 has 16 divisors (see below), whose sum is σ = 24510508416. Its totient is φ = 18629043840.

The previous prime is 21477600337. The next prime is 21477600377. The reversal of 21477600353 is 35300677412.

It is not a de Polignac number, because 21477600353 - 2⁴ = 21477600337 is a prime.

It is a super-2 number, since 2×21477600353² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21477600653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6476 + ... + 207357.

It is an arithmetic number, because the mean of its divisors is an integer number (1531906776).

Almost surely, 2^21477600353 is an apocalyptic number.

21477600353 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21477600353 is a deficient number, since it is larger than the sum of its proper divisors (3032908063).

21477600353 is a wasteful number, since it uses less digits than its factorization.

21477600353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214264.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 21477600353 in words is "twenty-one billion, four hundred seventy-seven million, six hundred thousand, three hundred fifty-three".