21310433412 has 24 divisors (see below), whose sum is σ = 49742483616. Its totient is φ = 7100886528.

The previous prime is 21310433401. The next prime is 21310433449. The reversal of 21310433412 is 21433401312.

It is a happy number.

It is a super-3 number, since 3×21310433412³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289498 + ... + 355569.

It is an arithmetic number, because the mean of its divisors is an integer number (2072603484).

Almost surely, 2^21310433412 is an apocalyptic number.

It is an amenable number.

21310433412 is an abundant number, since it is smaller than the sum of its proper divisors (28432050204).

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

21310433412 is a wasteful number, since it uses less digits than its factorization.

21310433412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647827 (or 647825 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21310433412 its reverse (21433401312), we get a palindrome (42743834724).

The spelling of 21310433412 in words is "twenty-one billion, three hundred ten million, four hundred thirty-three thousand, four hundred twelve".