21102032404434 has 32 divisors (see below), whose sum is σ = 45063187513344. Its totient is φ = 6571714842000.

The previous prime is 21102032404399. The next prime is 21102032404469. The reversal of 21102032404434 is 43440423020112.

It is an interprime number because it is at equal distance from previous prime (21102032404399) and next prime (21102032404469).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1778055442 + ... + 1778067309.

It is an arithmetic number, because the mean of its divisors is an integer number (1408224609792).

Almost surely, 2^{21102032404434} is an apocalyptic number.

21102032404434 is an abundant number, since it is smaller than the sum of its proper divisors (23961155108910).

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

21102032404434 is a wasteful number, since it uses less digits than its factorization.

21102032404434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556122822.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21102032404434 its reverse (43440423020112), we get a palindrome (64542455424546).

The spelling of 21102032404434 in words is "twenty-one trillion, one hundred two billion, thirty-two million, four hundred four thousand, four hundred thirty-four".