21488407145 has 8 divisors (see below), whose sum is σ = 26027080704. Its totient is φ = 17030064304.

The previous prime is 21488407141. The next prime is 21488407151. The reversal of 21488407145 is 54170488412.

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

It is a cyclic number.

It is not a de Polignac number, because 21488407145 - 2² = 21488407141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21488407096 and 21488407105.

It is not an unprimeable number, because it can be changed into a prime (21488407141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20082089 + ... + 20083158.

It is an arithmetic number, because the mean of its divisors is an integer number (3253385088).

Almost surely, 2^21488407145 is an apocalyptic number.

It is an amenable number.

21488407145 is a deficient number, since it is larger than the sum of its proper divisors (4538673559).

21488407145 is a wasteful number, since it uses less digits than its factorization.

21488407145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40165359.

The product of its (nonzero) digits is 286720, while the sum is 44.

The spelling of 21488407145 in words is "twenty-one billion, four hundred eighty-eight million, four hundred seven thousand, one hundred forty-five".