21062134234 has 16 divisors (see below), whose sum is σ = 32144364000. Its totient is φ = 10347520624.

The previous prime is 21062134211. The next prime is 21062134237. The reversal of 21062134234 is 43243126012.

It is a happy number.

It is a super-2 number, since 2×21062134234² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21062134237) 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, 205164 + ... + 290200.

It is an arithmetic number, because the mean of its divisors is an integer number (2009022750).

Almost surely, 2^21062134234 is an apocalyptic number.

21062134234 is a deficient number, since it is larger than the sum of its proper divisors (11082229766).

21062134234 is a wasteful number, since it uses less digits than its factorization.

21062134234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87197.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 21062134234 in words is "twenty-one billion, sixty-two million, one hundred thirty-four thousand, two hundred thirty-four".