21403753030234 has 32 divisors (see below), whose sum is σ = 32740613942400. Its totient is φ = 10492302216000.

The previous prime is 21403753030169. The next prime is 21403753030301. The reversal of 21403753030234 is 43203035730412.

It is a super-2 number, since 2×21403753030234² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21403753030193 and 21403753030202.

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 15 ways as a sum of consecutive naturals, for example, 399677292 + ... + 399730840.

It is an arithmetic number, because the mean of its divisors is an integer number (1023144185700).

Almost surely, 2^{21403753030234} is an apocalyptic number.

21403753030234 is a deficient number, since it is larger than the sum of its proper divisors (11336860912166).

21403753030234 is a wasteful number, since it uses less digits than its factorization.

21403753030234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72966.

The product of its (nonzero) digits is 181440, while the sum is 37.

Adding to 21403753030234 its reverse (43203035730412), we get a palindrome (64606788760646).

The spelling of 21403753030234 in words is "twenty-one trillion, four hundred three billion, seven hundred fifty-three million, thirty thousand, two hundred thirty-four".