21437133173412 has 96 divisors (see below), whose sum is σ = 54697582485504. Its totient is φ = 6480600844800.

The previous prime is 21437133173389. The next prime is 21437133173413.

21437133173412 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21437133173413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108950473 + ... + 109147055.

It is an arithmetic number, because the mean of its divisors is an integer number (569766484224).

Almost surely, 2^{21437133173412} is an apocalyptic number.

21437133173412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21437133173412 is an abundant number, since it is smaller than the sum of its proper divisors (33260449312092).

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

21437133173412 is a wasteful number, since it uses less digits than its factorization.

21437133173412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198569 (or 198567 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The spelling of 21437133173412 in words is "twenty-one trillion, four hundred thirty-seven billion, one hundred thirty-three million, one hundred seventy-three thousand, four hundred twelve".