21942238134 has 16 divisors (see below), whose sum is σ = 44077802688. Its totient is φ = 7281858312.

The previous prime is 21942238121. The next prime is 21942238139. The reversal of 21942238134 is 43183224912.

It is a junction number, because it is equal to n+sod(n) for n = 21942238092 and 21942238101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21942238139) 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, 8053792 + ... + 8056515.

It is an arithmetic number, because the mean of its divisors is an integer number (2754862668).

Almost surely, 2^21942238134 is an apocalyptic number.

21942238134 is an abundant number, since it is smaller than the sum of its proper divisors (22135564554).

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

21942238134 is a wasteful number, since it uses less digits than its factorization.

21942238134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16110539.

The product of its digits is 82944, while the sum is 39.

The spelling of 21942238134 in words is "twenty-one billion, nine hundred forty-two million, two hundred thirty-eight thousand, one hundred thirty-four".