21475233257412 has 24 divisors (see below), whose sum is σ = 54664230110112. Its totient is φ = 6507646441600.

The previous prime is 21475233257411. The next prime is 21475233257459.

21475233257412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21475233257412² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21475233257411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81345580389 + ... + 81345580652.

It is an arithmetic number, because the mean of its divisors is an integer number (2277676254588).

Almost surely, 2^{21475233257412} is an apocalyptic number.

21475233257412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21475233257412 is an abundant number, since it is smaller than the sum of its proper divisors (33188996852700).

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

21475233257412 is a wasteful number, since it uses less digits than its factorization.

21475233257412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162691161059 (or 162691161057 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 48.

The spelling of 21475233257412 in words is "twenty-one trillion, four hundred seventy-five billion, two hundred thirty-three million, two hundred fifty-seven thousand, four hundred twelve".