21475457412 has 24 divisors (see below), whose sum is σ = 50113562016. Its totient is φ = 7157891328.

The previous prime is 21475457411. The next prime is 21475457459.

21475457412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21475457412² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21475457411) 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 7 ways as a sum of consecutive naturals, for example, 90903 + ... + 226305.

It is an arithmetic number, because the mean of its divisors is an integer number (2088065084).

Almost surely, 2^21475457412 is an apocalyptic number.

It is an amenable number.

21475457412 is an abundant number, since it is smaller than the sum of its proper divisors (28638104604).

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

21475457412 is a wasteful number, since it uses less digits than its factorization.

21475457412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148627 (or 148625 counting only the distinct ones).

The product of its digits is 313600, while the sum is 42.

The spelling of 21475457412 in words is "twenty-one billion, four hundred seventy-five million, four hundred fifty-seven thousand, four hundred twelve".