21423477432412 has 12 divisors (see below), whose sum is σ = 40899366007416. Its totient is φ = 9737944287440.

The previous prime is 21423477432347. The next prime is 21423477432419.

21423477432412 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423477432419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243448607143 + ... + 243448607230.

It is an arithmetic number, because the mean of its divisors is an integer number (3408280500618).

Almost surely, 2^{21423477432412} is an apocalyptic number.

21423477432412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21423477432412 is a deficient number, since it is larger than the sum of its proper divisors (19475888575004).

21423477432412 is a wasteful number, since it uses less digits than its factorization.

21423477432412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486897214388 (or 486897214386 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 46.

It can be divided in two parts, 2142347 and 7432412, that added together give a palindrome (9574759).

The spelling of 21423477432412 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred seventy-seven million, four hundred thirty-two thousand, four hundred twelve".