21445154234 has 8 divisors (see below), whose sum is σ = 36763121568. Its totient is φ = 9190780380.

The previous prime is 21445154209. The next prime is 21445154303. The reversal of 21445154234 is 43245154412.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21445154194 and 21445154203.

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, 765898352 + ... + 765898379.

It is an arithmetic number, because the mean of its divisors is an integer number (4595390196).

Almost surely, 2^21445154234 is an apocalyptic number.

21445154234 is a deficient number, since it is larger than the sum of its proper divisors (15317967334).

21445154234 is a wasteful number, since it uses less digits than its factorization.

21445154234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531796740.

The product of its digits is 76800, while the sum is 35.

The spelling of 21445154234 in words is "twenty-one billion, four hundred forty-five million, one hundred fifty-four thousand, two hundred thirty-four".