21023311343430 has 64 divisors (see below), whose sum is σ = 55181498842368. Its totient is φ = 5083722610560.

The previous prime is 21023311343393. The next prime is 21023311343467. The reversal of 21023311343430 is 3434311332012.

It is an interprime number because it is at equal distance from previous prime (21023311343393) and next prime (21023311343467).

It is a super-2 number, since 2×21023311343430² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 80104512 + ... + 80366531.

It is an arithmetic number, because the mean of its divisors is an integer number (862210919412).

Almost surely, 2^{21023311343430} is an apocalyptic number.

21023311343430 is an abundant number, since it is smaller than the sum of its proper divisors (34158187498938).

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

21023311343430 is a wasteful number, since it uses less digits than its factorization.

21023311343430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160471461.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 21023311343430 its reverse (3434311332012), we get a palindrome (24457622675442).

The spelling of 21023311343430 in words is "twenty-one trillion, twenty-three billion, three hundred eleven million, three hundred forty-three thousand, four hundred thirty".