21030430043402 has 48 divisors (see below), whose sum is σ = 35292045300480. Its totient is φ = 9384918940800.

The previous prime is 21030430043341. The next prime is 21030430043411. The reversal of 21030430043402 is 20434003403012.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10940777 + ... + 12718547.

It is an arithmetic number, because the mean of its divisors is an integer number (735250943760).

Almost surely, 2^{21030430043402} is an apocalyptic number.

21030430043402 is a deficient number, since it is larger than the sum of its proper divisors (14261615257078).

21030430043402 is a wasteful number, since it uses less digits than its factorization.

21030430043402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778959 (or 1778946 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21030430043402 its reverse (20434003403012), we get a palindrome (41464433446414).

The spelling of 21030430043402 in words is "twenty-one trillion, thirty billion, four hundred thirty million, forty-three thousand, four hundred two".