21632042003 has 32 divisors (see below), whose sum is σ = 26932554432. Its totient is φ = 17069875200.

The previous prime is 21632041993. The next prime is 21632042053. The reversal of 21632042003 is 30024023612.

It is a cyclic number.

It is not a de Polignac number, because 21632042003 - 2⁴ = 21632041987 is a prime.

It is a super-3 number, since 3×21632042003³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21632042003.

It is not an unprimeable number, because it can be changed into a prime (21632042053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3334523 + ... + 3341003.

It is an arithmetic number, because the mean of its divisors is an integer number (841642326).

Almost surely, 2^21632042003 is an apocalyptic number.

21632042003 is a deficient number, since it is larger than the sum of its proper divisors (5300512429).

21632042003 is a wasteful number, since it uses less digits than its factorization.

21632042003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7895.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21632042003 its reverse (30024023612), we get a palindrome (51656065615).

The spelling of 21632042003 in words is "twenty-one billion, six hundred thirty-two million, forty-two thousand, three".