21030242354 has 16 divisors (see below), whose sum is σ = 34415357760. Its totient is φ = 9558580560.

The previous prime is 21030242351. The next prime is 21030242369. The reversal of 21030242354 is 45324203012.

It is a super-3 number, since 3×21030242354³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21030242351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608852 + ... + 642464.

It is an arithmetic number, because the mean of its divisors is an integer number (2150959860).

Almost surely, 2^21030242354 is an apocalyptic number.

21030242354 is a deficient number, since it is larger than the sum of its proper divisors (13385115406).

21030242354 is a wasteful number, since it uses less digits than its factorization.

21030242354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62065.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21030242354 its reverse (45324203012), we get a palindrome (66354445366).

The spelling of 21030242354 in words is "twenty-one billion, thirty million, two hundred forty-two thousand, three hundred fifty-four".