21230141434 has 16 divisors (see below), whose sum is σ = 32160727872. Its totient is φ = 10509939648.

The previous prime is 21230141423. The next prime is 21230141497. The reversal of 21230141434 is 43414103212.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21230141399 and 21230141408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014162 + ... + 2024674.

It is an arithmetic number, because the mean of its divisors is an integer number (2010045492).

Almost surely, 2^21230141434 is an apocalyptic number.

21230141434 is a deficient number, since it is larger than the sum of its proper divisors (10930586438).

21230141434 is a wasteful number, since it uses less digits than its factorization.

21230141434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20421.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21230141434 its reverse (43414103212), we get a palindrome (64644244646).

The spelling of 21230141434 in words is "twenty-one billion, two hundred thirty million, one hundred forty-one thousand, four hundred thirty-four".