21220434144030 has 64 divisors (see below), whose sum is σ = 55684370481408. Its totient is φ = 5132735112960.

The previous prime is 21220434143941. The next prime is 21220434144043. The reversal of 21220434144030 is 3044143402212.

It is a super-2 number, since 2×21220434144030² (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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72432079 + ... + 72724458.

It is an arithmetic number, because the mean of its divisors is an integer number (870068288772).

Almost surely, 2^{21220434144030} is an apocalyptic number.

21220434144030 is an abundant number, since it is smaller than the sum of its proper divisors (34463936337378).

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

21220434144030 is a wasteful number, since it uses less digits than its factorization.

21220434144030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145157001.

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

Adding to 21220434144030 its reverse (3044143402212), we get a palindrome (24264577546242).

The spelling of 21220434144030 in words is "twenty-one trillion, two hundred twenty billion, four hundred thirty-four million, one hundred forty-four thousand, thirty".