21003423420332 has 24 divisors (see below), whose sum is σ = 36959910907920. Its totient is φ = 10443451538880.

The previous prime is 21003423420323. The next prime is 21003423420379. The reversal of 21003423420332 is 23302432430012.

It is a super-2 number, since 2×21003423420332² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003423420295 and 21003423420304.

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, 33629519 + ... + 34248377.

It is an arithmetic number, because the mean of its divisors is an integer number (1539996287830).

Almost surely, 2^{21003423420332} is an apocalyptic number.

It is an amenable number.

21003423420332 is a deficient number, since it is larger than the sum of its proper divisors (15956487487588).

21003423420332 is a wasteful number, since it uses less digits than its factorization.

21003423420332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665921 (or 665919 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 21003423420332 its reverse (23302432430012), we get a palindrome (44305855850344).

The spelling of 21003423420332 in words is "twenty-one trillion, three billion, four hundred twenty-three million, four hundred twenty thousand, three hundred thirty-two".