21002340134 has 8 divisors (see below), whose sum is σ = 31517701248. Its totient is φ = 10496439720.

The previous prime is 21002340103. The next prime is 21002340173. The reversal of 21002340134 is 43104320012.

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

It is a super-2 number, since 2×21002340134² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2359622 + ... + 2368505.

It is an arithmetic number, because the mean of its divisors is an integer number (3939712656).

Almost surely, 2^21002340134 is an apocalyptic number.

21002340134 is a deficient number, since it is larger than the sum of its proper divisors (10515361114).

21002340134 is a wasteful number, since it uses less digits than its factorization.

21002340134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730350.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21002340134 its reverse (43104320012), we get a palindrome (64106660146).

The spelling of 21002340134 in words is "twenty-one billion, two million, three hundred forty thousand, one hundred thirty-four".