21432623412 has 24 divisors (see below), whose sum is σ = 50013180000. Its totient is φ = 7143675616.

The previous prime is 21432623411. The next prime is 21432623423.

21432623412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21432623412² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21432623412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432623411) 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, 122839 + ... + 240737.

It is an arithmetic number, because the mean of its divisors is an integer number (2083882500).

Almost surely, 2^21432623412 is an apocalyptic number.

It is an amenable number.

21432623412 is an abundant number, since it is smaller than the sum of its proper divisors (28580556588).

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

21432623412 is a wasteful number, since it uses less digits than its factorization.

21432623412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133055 (or 133053 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The spelling of 21432623412 in words is "twenty-one billion, four hundred thirty-two million, six hundred twenty-three thousand, four hundred twelve".