21342404030 has 32 divisors (see below), whose sum is σ = 40231439424. Its totient is φ = 8136285696.

The previous prime is 21342404009. The next prime is 21342404033. The reversal of 21342404030 is 3040424312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 21342403987 and 21342404005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342404033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103787 + ... + 231206.

It is an arithmetic number, because the mean of its divisors is an integer number (1257232482).

Almost surely, 2^21342404030 is an apocalyptic number.

21342404030 is a deficient number, since it is larger than the sum of its proper divisors (18889035394).

21342404030 is a wasteful number, since it uses less digits than its factorization.

21342404030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335300.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21342404030 its reverse (3040424312), we get a palindrome (24382828342).

The spelling of 21342404030 in words is "twenty-one billion, three hundred forty-two million, four hundred four thousand, thirty".