21477371534412 has 96 divisors (see below), whose sum is σ = 52993702379520. Its totient is φ = 6758958877440.

The previous prime is 21477371534393. The next prime is 21477371534413. The reversal of 21477371534412 is 21443517377412.

It is a super-2 number, since 2×21477371534412² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477371534413) 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, 17174962 + ... + 18382982.

It is an arithmetic number, because the mean of its divisors is an integer number (552017733120).

Almost surely, 2^{21477371534412} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21477371534412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26496851189760).

21477371534412 is an abundant number, since it is smaller than the sum of its proper divisors (31516330845108).

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

21477371534412 is a wasteful number, since it uses less digits than its factorization.

21477371534412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209191 (or 1209189 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 51.

The spelling of 21477371534412 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred seventy-one million, five hundred thirty-four thousand, four hundred twelve".