21420414333134 has 16 divisors (see below), whose sum is σ = 32945356295808. Its totient is φ = 10439651795832.

The previous prime is 21420414333079. The next prime is 21420414333139. The reversal of 21420414333134 is 43133341402412.

It is a junction number, because it is equal to n+sod(n) for n = 21420414333094 and 21420414333103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21420414333139) 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, 255681512 + ... + 255765275.

It is an arithmetic number, because the mean of its divisors is an integer number (2059084768488).

Almost surely, 2^{21420414333134} is an apocalyptic number.

21420414333134 is a deficient number, since it is larger than the sum of its proper divisors (11524941962674).

21420414333134 is a wasteful number, since it uses less digits than its factorization.

21420414333134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511447319.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 21420414333134 its reverse (43133341402412), we get a palindrome (64553755735546).

The spelling of 21420414333134 in words is "twenty-one trillion, four hundred twenty billion, four hundred fourteen million, three hundred thirty-three thousand, one hundred thirty-four".