21003152444434 has 32 divisors (see below), whose sum is σ = 32269392432576. Its totient is φ = 10248929246400.

The previous prime is 21003152444429. The next prime is 21003152444441. The reversal of 21003152444434 is 43444425130012.

It is a happy number.

It is a super-2 number, since 2×21003152444434² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003152444393 and 21003152444402.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15022909 + ... + 16361359.

It is an arithmetic number, because the mean of its divisors is an integer number (1008418513518).

Almost surely, 2^{21003152444434} is an apocalyptic number.

21003152444434 is a deficient number, since it is larger than the sum of its proper divisors (11266239988142).

21003152444434 is a wasteful number, since it uses less digits than its factorization.

21003152444434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339290.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 21003152444434 its reverse (43444425130012), we get a palindrome (64447577574446).

The spelling of 21003152444434 in words is "twenty-one trillion, three billion, one hundred fifty-two million, four hundred forty-four thousand, four hundred thirty-four".