21402341034 has 16 divisors (see below), whose sum is σ = 42830441472. Its totient is φ = 7129820448.

The previous prime is 21402341021. The next prime is 21402341039. The reversal of 21402341034 is 43014320412.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21402340995 and 21402341013.

It is not an unprimeable number, because it can be changed into a prime (21402341039) 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, 1062499 + ... + 1082454.

It is an arithmetic number, because the mean of its divisors is an integer number (2676902592).

Almost surely, 2^21402341034 is an apocalyptic number.

21402341034 is an abundant number, since it is smaller than the sum of its proper divisors (21428100438).

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

21402341034 is a wasteful number, since it uses less digits than its factorization.

21402341034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146621.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21402341034 its reverse (43014320412), we get a palindrome (64416661446).

The spelling of 21402341034 in words is "twenty-one billion, four hundred two million, three hundred forty-one thousand, thirty-four".