21435043002 has 32 divisors (see below), whose sum is σ = 45216960000. Its totient is φ = 6755377968.

The previous prime is 21435042991. The next prime is 21435043013. The reversal of 21435043002 is 20034053412.

It is an interprime number because it is at equal distance from previous prime (21435042991) and next prime (21435043013).

It is a super-2 number, since 2×21435043002² (a number of 21 digits) contains 22 as substring.

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, 131518 + ... + 245289.

It is an arithmetic number, because the mean of its divisors is an integer number (1413030000).

Almost surely, 2^21435043002 is an apocalyptic number.

21435043002 is an abundant number, since it is smaller than the sum of its proper divisors (23781916998).

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

21435043002 is a wasteful number, since it uses less digits than its factorization.

21435043002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377330.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21435043002 its reverse (20034053412), we get a palindrome (41469096414).

The spelling of 21435043002 in words is "twenty-one billion, four hundred thirty-five million, forty-three thousand, two".