21435230046 has 32 divisors (see below), whose sum is σ = 43928172288. Its totient is φ = 6969251520.

The previous prime is 21435229957. The next prime is 21435230081. The reversal of 21435230046 is 64003253412.

It is a super-4 number, since 4×21435230046⁴ (a number of 42 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21435229995 and 21435230022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130426 + ... + 244706.

It is an arithmetic number, because the mean of its divisors is an integer number (1372755384).

Almost surely, 2^21435230046 is an apocalyptic number.

21435230046 is an abundant number, since it is smaller than the sum of its proper divisors (22492942242).

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

21435230046 is a wasteful number, since it uses less digits than its factorization.

21435230046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115056.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21435230046 its reverse (64003253412), we get a palindrome (85438483458).

The spelling of 21435230046 in words is "twenty-one billion, four hundred thirty-five million, two hundred thirty thousand, forty-six".