21435120046 has 32 divisors (see below), whose sum is σ = 33245160480. Its totient is φ = 10358745600.

The previous prime is 21435120041. The next prime is 21435120103. The reversal of 21435120046 is 64002153412.

It is a junction number, because it is equal to n+sod(n) for n = 21435119996 and 21435120023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435120041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4121920 + ... + 4127116.

It is an arithmetic number, because the mean of its divisors is an integer number (1038911265).

Almost surely, 2^21435120046 is an apocalyptic number.

21435120046 is a deficient number, since it is larger than the sum of its proper divisors (11810040434).

21435120046 is a wasteful number, since it uses less digits than its factorization.

21435120046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21435120046 its reverse (64002153412), we get a palindrome (85437273458).

The spelling of 21435120046 in words is "twenty-one billion, four hundred thirty-five million, one hundred twenty thousand, forty-six".