21403231134 has 8 divisors (see below), whose sum is σ = 42806462280. Its totient is φ = 7134410376.

The previous prime is 21403231121. The next prime is 21403231147. The reversal of 21403231134 is 43113230412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21403231121) and next prime (21403231147).

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

21403231134 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 1783602589 + ... + 1783602600.

It is an arithmetic number, because the mean of its divisors is an integer number (5350807785).

Almost surely, 2^21403231134 is an apocalyptic number.

21403231134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21403231134 is a wasteful number, since it uses less digits than its factorization.

21403231134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567205194.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21403231134 its reverse (43113230412), we get a palindrome (64516461546).

The spelling of 21403231134 in words is "twenty-one billion, four hundred three million, two hundred thirty-one thousand, one hundred thirty-four".