21430262134 has 8 divisors (see below), whose sum is σ = 32146095960. Its totient is φ = 10714896816.

The previous prime is 21430262131. The next prime is 21430262137. The reversal of 21430262134 is 43126203412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21430262131) and next prime (21430262137).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21430262134² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430262131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38682 + ... + 210610.

It is an arithmetic number, because the mean of its divisors is an integer number (4018261995).

Almost surely, 2^21430262134 is an apocalyptic number.

21430262134 is a deficient number, since it is larger than the sum of its proper divisors (10715833826).

21430262134 is a wasteful number, since it uses less digits than its factorization.

21430262134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234254.

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

Adding to 21430262134 its reverse (43126203412), we get a palindrome (64556465546).

The spelling of 21430262134 in words is "twenty-one billion, four hundred thirty million, two hundred sixty-two thousand, one hundred thirty-four".