21412135434 has 16 divisors (see below), whose sum is σ = 43820184672. Its totient is φ = 6971392848.

The previous prime is 21412135417. The next prime is 21412135469. The reversal of 21412135434 is 43453121412.

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, 41496129 + ... + 41496644.

It is an arithmetic number, because the mean of its divisors is an integer number (2738761542).

Almost surely, 2^21412135434 is an apocalyptic number.

21412135434 is an abundant number, since it is smaller than the sum of its proper divisors (22408049238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21412135434 is a wasteful number, since it uses less digits than its factorization.

21412135434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82992821.

The product of its digits is 11520, while the sum is 30.

Adding to 21412135434 its reverse (43453121412), we get a palindrome (64865256846).

The spelling of 21412135434 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-five thousand, four hundred thirty-four".