21250034003434 has 16 divisors (see below), whose sum is σ = 35526372638400. Its totient is φ = 9473699369664.

The previous prime is 21250034003423. The next prime is 21250034003437. The reversal of 21250034003434 is 43430043005212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21250034003396 and 21250034003405.

It is not an unprimeable number, because it can be changed into a prime (21250034003437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16447394094 + ... + 16447395385.

It is an arithmetic number, because the mean of its divisors is an integer number (2220398289900).

Almost surely, 2^{21250034003434} is an apocalyptic number.

21250034003434 is a deficient number, since it is larger than the sum of its proper divisors (14276338634966).

21250034003434 is a wasteful number, since it uses less digits than its factorization.

21250034003434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32894789517.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 21250034003434 its reverse (43430043005212), we get a palindrome (64680077008646).

The spelling of 21250034003434 in words is "twenty-one trillion, two hundred fifty billion, thirty-four million, three thousand, four hundred thirty-four".