21475334220 has 48 divisors (see below), whose sum is σ = 60158191968. Its totient is φ = 5724160000.

The previous prime is 21475334147. The next prime is 21475334249. The reversal of 21475334220 is 2243357412.

It is a super-2 number, since 2×21475334220² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 54220 + ... + 214220.

It is an arithmetic number, because the mean of its divisors is an integer number (1253295666).

Almost surely, 2^21475334220 is an apocalyptic number.

21475334220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21475334220 is an abundant number, since it is smaller than the sum of its proper divisors (38682857748).

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

21475334220 is a wasteful number, since it uses less digits than its factorization.

21475334220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162250 (or 162248 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

The spelling of 21475334220 in words is "twenty-one billion, four hundred seventy-five million, three hundred thirty-four thousand, two hundred twenty".